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Business Statistics
The average number of children a Japanese woman has in her lifetime is 1.37. Suppose that one Japanese woman is randomly chosen.a. In words, define the random variable X.b. List the values that X may
The average number of children a Spanish woman has in her lifetime is 1.47. Suppose that one Spanish woman is randomly chosen.a. In words, define the Random Variable X.b. List the values that X may
Fertile, female cats produce an average of three litters per year. Suppose that one fertile, female cat is randomly chosen.In one year, find the probability she produces:a. In words, define the
The chance of having an extra fortune in a fortune cookie is about 3%. Given a bag of 144 fortune cookies, we are interested in the number of cookies with an extra fortune. Two distributions may be
According to the South Carolina Department of Mental Health web site, for every 200 U.S. women, the average number who suffer from anorexia is one. Out of a randomly chosen group of 600 U.S. women
The chance of an IRS audit for a tax return with over \($25,000\) in income is about 2% per year. Suppose that 100 people with tax returns over \($25,000\) are randomly picked. We are interested in
Approximately 8% of students at a local high school participate in after-school sports all four years of high school. A group of 60 seniors is randomly chosen. Of interest is the number that
On average, Pierre, an amateur chef, drops three pieces of egg shell into every two cake batters he makes. Suppose that you buy one of his cakes.a. In words, define the random variable X.b. List the
In words, the random variable X = _________________a. the number of times Mrs. Plum’s cats wake her up each week.b. the number of times Mrs. Plum’s cats wake her up each hour.c. the number of
Find the probability that her cats will wake her up no more than five times next week.a. 0.5000b. 0.9329c. 0.0378d. 0.0671
Fill in the blankX ~ N(1, 2)σ = _______
In a survey, 40 people were asked how many times they visited a store before making a major purchase. The results areshown in Table 2.34. Number of times in store Frequency 1 4 2 10 3 16 4 6 5 4
In a survey, several people were asked how many years it has been since they purchased a mattress. The results are shown in Table 2.35. Years since last purchase Frequency 0 1 2 8 2 3 4 13 22 16 5 9
Several children were asked how many TV shows they watch each day. The results of the survey are shown in Table 2.36. Number of TV Shows Frequency 0 1 12 18 2 36 3 7 4 2 Table 2.36
The students in Ms. Ramirez’s math class have birthdays in each of the four seasons. Table 2.37 shows the four seasons, the number of students who have birthdays in each season, and the percentage
Using the data from Mrs. Ramirez’s math class supplied in Exercise 2.4, construct a bar graph showing the percentages.Exercise 2.4,The students in Ms. Ramirez’s math class have birthdays in each
David County has six high schools. Each school sent students to participate in a county-wide science competition. Table 2.38 shows the percentage breakdown of competitors from each school, and the
Use the data from the David County science competition supplied in Exercise 2.6. Construct a bar graph that shows the county-wide population percentage of students at each school.Exercise 2.6.David
Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four
What does the frequency column in Table 2.39 sum to? Why? Data Value (# cars) Frequency Relative Frequency Cumulative Relative Frequency Table 2.39
What does the relative frequency column in Table 2.39 sum to? Why? Data Value (# cars) Frequency Relative Frequency Cumulative Relative Frequency Table 2.39
To construct the histogram for the data in Table 2.39, determine appropriate minimum and maximum x and y values and the scaling. Sketch the histogram. Label the horizontal and vertical axes with
Construct a frequency polygon for the following: a. b. Pulse Rates for Women Frequency 60-69 12 70-79 14 80-89 11 90-99 1 100-109 1 110-119 0 120-129 1 Table 2.40 Actual Speed in a 30 MPH Zone
Construct a frequency polygon from the frequency distribution for the 50 highest ranked countries for depth of hunger. Depth of Hunger Frequency 230-259 21 260-289 13. 290-319 5 320-349 7 350-379 1
Use the two frequency tables to compare the life expectancy of men and women from 20 randomly selected countries.Include an overlayed frequency polygon and discuss the shapes of the distributions,
Construct a times series graph for(a) the number of male births,(b) the number of female births, and(c) the total number of births. 1857 Male Total Sex/Year 1855 1856 1858 1859 1860 Female 45,545
The following data sets list full time police per 100,000 citizens along with homicides per 100,000 citizens for the city of Detroit, Michigan during the period from 1961 to 1973.a. Construct a
Listed are 29 ages for Academy Award winning best actors in order from smallest to largest.18; 21; 22; 25; 26; 27; 29; 30; 31; 33; 36; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74;
Listed are 32 ages for Academy Award winning best actors in order from smallest to largest.18; 18; 21; 22; 25; 26; 27; 29; 30; 31; 31; 33; 36; 37; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71;
Jesse was ranked 37th in his graduating class of 180 students. At what percentile is Jesse’s ranking?
a. For runners in a race, a low time means a faster run. The winners in a race have the shortest running times. Is it more desirable to have a finish time with a high or a low percentile when running
a. For runners in a race, a higher speed means a faster run. Is it more desirable to have a speed with a high or a low percentile when running a race?b. The 40th percentile of speeds in a particular
On an exam, would it be more desirable to earn a grade with a high or low percentile? Explain.
Mina is waiting in line at the Department of Motor Vehicles (DMV). Her wait time of 32 minutes is the 85th percentile of wait times. Is that good or bad? Write a sentence interpreting the 85th
In a survey collecting data about the salaries earned by recent college graduates, Li found that her salary was in the 78th percentile. Should Li be pleased or upset by this result? Explain.
In a study collecting data about the repair costs of damage to automobiles in a certain type of crash tests, a certain model of car had $1,700 in damage and was in the 90th percentile. Should the
The University of California has two criteria used to set admission standards for freshman to be admitted to a college in the UC system:a. Students' GPAs and scores on standardized tests (SATs and
Suppose that you are buying a house. You and your realtor have determined that the most expensive house you can afford is the 34th percentile. The 34th percentile of housing prices is $240,000 in the
First quartile = _______
Second quartile = median = 50th percentile = _______
Third quartile = _______
Interquartile range (IQR) = _____ – _____ = _____
10th percentile = _______
70th percentile = _______
Find the mean for the following frequency tables. Frequency a. Grade 49.5-59.5 2 59.5-69.5 3 69.5-79.5 8 79.5-89.5 12 89.5-99.5 5 Table 2.51 b. Daily Low Temperature Frequency 49.5-59.5 53 59.5-69.5
Calculate the mean.The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 25; 25; 25; 26; 26; 27; 27; 27; 28;
Identify the median.The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 25; 25; 25; 26; 26; 27; 27; 27; 28;
Identify the mode.The following data show the lengths of boats moored in a marina. The data are ordered from smallest to largest: 16; 17; 19; 20; 20; 21; 23; 24; 25; 25; 25; 26; 26; 27; 27; 27; 28;
sample mean = X̅ = _______ Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three
median = _______ Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars;nineteen
mode = _______ Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars;nineteen
A group of 10 children are on a scavenger hunt to find different color rocks. The results are shown in the Table 2.54 below. The column on the right shows the number of colors of rocks each child
A group of children are measured to determine the average height of the group. The results are in Table 2.55 below.What is the mean height of the group to the nearest hundredth of an inch? Child
A person compares prices for five automobiles. The results are in Table 2.56. What is the mean price of the cars the person has considered? Price $20,987 $22,008 $19,998 $23,433 $21,444 Table 2.56
A customer protection service has obtained 8 bags of candy that are supposed to contain 16 ounces of candy each. The candy is weighed to determine if the average weight is at least the claimed 16
A teacher records grades for a class of 70, 72, 79, 81, 82, 82, 83, 90, and 95. What is the mean of these grades?
A family is polled to see the mean of the number of hours per day the television set is on. The results, starting with Sunday, are 6, 3, 2, 3, 1, 3, and 7 hours. What is the average number of hours
A city received the following rainfall for a recent year. What is the mean number of inches of rainfall the city received monthly, to the nearest hundredth of an inch? Use Table 2.58. Month Rainfall
A football team scored the following points in its first 8 games of the new season. Starting at game 1 and in order the scores are 14, 14, 24, 21, 7, 0, 38, and 28. What is the mean number of points
What is the geometric mean of the data set given? 5, 10, 20
What is the geometric mean of the data set given? a. 9.000, b. 15.00, c. 21.00
What is the geometric mean of the data set given? 7.0, 10.0, 39.2
What is the geometric mean of the data set given? 17.00, 10.00, 19.00
What is the average rate of return for the values that follow? 1.0, 2.0, 1.5
In a particular college class, there are male and female students. Some students have long hair and some students have short hair. Write the symbols for the probabilities of the events for parts a
Find P(H).box is filled with several party favors. It contains 12hats, 15 noisemakers, ten finger traps, and five bags of confetti.Let H = the event of getting a hat.Let N = the event of getting a
Find P(N).box is filled with several party favors. It contains 12hats, 15 noisemakers, ten finger traps, and five bags of confetti.Let H = the event of getting a hat.Let N = the event of getting a
Find P(F).box is filled with several party favors. It contains 12hats, 15 noisemakers, ten finger traps, and five bags of confetti.Let H = the event of getting a hat.Let N = the event of getting a
Find P(C).box is filled with several party favors. It contains 12hats, 15 noisemakers, ten finger traps, and five bags of confetti.Let H = the event of getting a hat.Let N = the event of getting a
Find P(B).jar of 150 jelly beans contains 22 red jelly beans, 38yellow, 20 green, 28 purple, 26 blue, and the rest are orange.Let B = the event of getting a blue jelly beanLet G = the event of
Find P(G).jar of 150 jelly beans contains 22 red jelly beans, 38yellow, 20 green, 28 purple, 26 blue, and the rest are orange.Let B = the event of getting a blue jelly beanLet G = the event of
Find P(P).jar of 150 jelly beans contains 22 red jelly beans, 38yellow, 20 green, 28 purple, 26 blue, and the rest are orange.Let B = the event of getting a blue jelly beanLet G = the event of
Find P(R).jar of 150 jelly beans contains 22 red jelly beans, 38yellow, 20 green, 28 purple, 26 blue, and the rest are orange.Let B = the event of getting a blue jelly beanLet G = the event of
Find P(Y).jar of 150 jelly beans contains 22 red jelly beans, 38yellow, 20 green, 28 purple, 26 blue, and the rest are orange.Let B = the event of getting a blue jelly beanLet G = the event of
Find P(O).jar of 150 jelly beans contains 22 red jelly beans, 38yellow, 20 green, 28 purple, 26 blue, and the rest are orange.Let B = the event of getting a blue jelly beanLet G = the event of
Find P(A).There are 23 countries in North America, 12 countries inSouth America, 47 countries in Europe, 44 countries in Asia, 54 countries in Africa, and 14 in Oceania (Pacific Oceanregion).Let A =
Find P(E).There are 23 countries in North America, 12 countries inSouth America, 47 countries in Europe, 44 countries in Asia, 54 countries in Africa, and 14 in Oceania (Pacific Oceanregion).Let A =
Find P(F).There are 23 countries in North America, 12 countries inSouth America, 47 countries in Europe, 44 countries in Asia, 54 countries in Africa, and 14 in Oceania (Pacific Oceanregion).Let A =
Find P(N).There are 23 countries in North America, 12 countries inSouth America, 47 countries in Europe, 44 countries in Asia, 54 countries in Africa, and 14 in Oceania (Pacific Oceanregion).Let A =
Find P(O).There are 23 countries in North America, 12 countries inSouth America, 47 countries in Europe, 44 countries in Asia, 54 countries in Africa, and 14 in Oceania (Pacific Oceanregion).Let A =
Find P(S).There are 23 countries in North America, 12 countries inSouth America, 47 countries in Europe, 44 countries in Asia, 54 countries in Africa, and 14 in Oceania (Pacific Oceanregion).Let A =
What is the probability of drawing a red card in a standard deck of 52 cards?
What is the probability of drawing a club in a standard deck of 52 cards?
What is the probability of rolling an even number of dots with a fair, six-sided die numbered one through six?
What is the probability of rolling a prime number of dots with a fair, six-sided die numbered one through six?
If you land on Y, you get the biggest prize. Find P(Y).You see a game at a local fair. You have to throw a dart at acolor wheel. Each section on the color wheel is equal in area.Let B = the event of
If you land on red, you don’t get a prize. What is P(R)?You see a game at a local fair. You have to throw a dart at acolor wheel. Each section on the color wheel is equal in area.Let B = the event
Write the symbols for the probability that a player is not an outfielder.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some players are not great
Write the symbols for the probability that a player is an outfielder or is a great hitter.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some players are
Write the symbols for the probability that a player is an infielder and is not a great hitter.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some players
Write the symbols for the probability that a player is a great hitter, given that the player is an infielder.On a baseball team, there are infielders and outfielders.Some players are great hitters,
Write the symbols for the probability that a player is an infielder, given that the player is a great hitter.On a baseball team, there are infielders and outfielders.Some players are great hitters,
Write the symbols for the probability that of all the outfielders, a player is not a great hitter.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some
Write the symbols for the probability that of all the great hitters, a player is an outfielder.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some
Write the symbols for the probability that a player is an infielder or is not a great hitter.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some players
Write the symbols for the probability that a player is an outfielder and is a great hitter.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some players
Write the symbols for the probability that a player is an infielder.On a baseball team, there are infielders and outfielders.Some players are great hitters, and some players are not great hitters.Let
What is the word for the set of all possible outcomes?
What is conditional probability?
A shelf holds 12 books. Eight are fiction and the rest are nonfiction. Each is a different book with a unique title. Thefiction books are numbered one to eight. The nonfiction books are numbered one
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