question number should be on the top.

This Question: 1 pt 18 of 35 This Quiz: 35 pts possible Question Help Determine whether the following statement is true or false. The shape of the distribution shown is best classified as uniform. 10 15 20 25 30 35 40 45 Choose the correct answer below. O True O FalseThis Question: 1 pt 19 of 35 This Quiz: 35 pts possible Question Help The following frequency histogram represents the IQ scores of a random sample of IQs of 7th Grade Students seventh-grade students. IQs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (9) 80- Frequency 60- 49 53 40 30 20- 4 11 2 3 60 70 80 90 100 110 120 130 140 150 160 IQ scores (a) How many students were sampled? students (b) Determine the class width. The class width is (c) Identify the classes and their frequencies. Choose the correct answer below. O A. 60-70, 2; 70-80, 4; 80-90, 11; 90-100, 49; 100-110, 53; 110-120, 40; 120-130, 30; 130-140, 7; 140-150, 3; 150-160, 1 O B. 65, 2; 75, 4; 85, 11; 95, 49; 105, 53; 115, 40; 125, 30; 135, 7; 145, 3; 155, 1 O C. 60-69, 2; 70-79, 4; 80-89, 11; 90-99, 49; 100-109, 53; 110-119, 40; 120-129, 30; 130-139, 7; 140-149, 3; 150-159, 1 (d) Which class has the highest frequency? Click to select your answer(s). ? Save for LaterThis Question: 1 pt 19 of 35 This Quiz: 35 pts possible Question Help The following frequency histogram represents the IQ scores of a random sample of IQs of 7th Grade Students seventh-grade students. IQs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (9). Frequency 49 53 40 30 11 2 3 60 70 80 90 100 110 120 130 140 150 160 IQ scores (d) Which class has the highest frequency? O A. 105 O B. 90-99 O C. 100-109 O D. 100-110 (e) Which class has the lowest frequency? O A. 150-159 O B. 155 O C. 150-160 Click to select your answer(s). ? Save for LaterQuiz: QUIZ #3: REVIEW QUIZ FOR EXAM 1 - Ch.1, Ch.2, & Ch 3 Submit Quiz This Question: 1 pt 19 of 35 This Quiz: 35 pts possible Question Help The following frequency histogram represents the IQ scores of a random sample of IQs of 7th Grade Students seventh-grade students. IQs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (9). 80- Frequency 60- 19 53 40- 40 30 20- 11 2 4 3 60 70 80 90 100 110 120 130 140 150 160 IQ scores O C. 150-160 O D. 60-69 (f) What percent of students had an IQ of at least 130? % (Type an integer or a decimal. Do not round.) (g) Did any students have an IQ of 163? O A. Yes, because there is a bar in the 150-159 class. O B. Yes, because there is a frequency of a score of 165. O C. No, because there is a bar in the 150-159 class. O D. No, because there are no bars, or frequencies, greater than an IQ of 160. Click to select your answer(s). ? Save for LaterThis Question: 1 pt 20 of 35 This Quiz: 35 pts possible Question Help The data to the right represent the top speed (in kilometers per hour) of all the players (except goaltenders) in a certain soccer league. Find (a) the number of classes, (b) the class limits for the fourth class, and (c) the class width. Speed (km/hr) Number of Players 10-15.9 7 16-21.9 23 22-27.9 165 28-33.9 380 (a) There are |classes. (Type a whole number.) (b) The lower class limit for the fourth class is (Type an integer or a decimal. Do not round.) The upper class limit for the fourth class is (Type an integer or a decimal. Do not round.) (c) The class width is (Type an integer or a decimal. Do not round.) Enter your answer in each of the answer boxes. ?This Question: 1 pt 22 of 35 This Quiz: 35 pts possible Question Help Find the population mean or sample mean as indicated. Population: 3, 5, 17, 10, 25 Select the correct choice below and fill in the answer box to complete your choice. O A. X= O B. U= Click to select and enter your answer(s). ? Save for LaterThis Question: 1 pt 23 of 35 This Quiz: 35 pts possible i Question Help An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair for each of the four crashes were $400, $410, $492, and $207 0 . Compute the mean, median, and mode cost of repair. Compute the mean cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The mean cost of repair is $ . (Round to the nearest cent as needed.) O B. The mean does not exist. Compute the median cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The median cost of repair is $ . (Round to the nearest cent as needed.) O B. The median does not exist. Compute the mode cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mode cost of repair is $ . (Round to the nearest cent as needed.) O B. The mode does not exist. Click to select and enter your answer(s). ? Save for LaterThis Question: 1 pt 24 of 35 This Quiz: 35 pts possible Question Help Identify the symbols used for each of the following: (a) sample standard deviation; (b) population standard deviation; (c) sample variance; (d) population variance. a. The symbol for sample standard deviation is b. The symbol for population standard deviation is c. The symbol for sample variance is d. The symbol for population variance is Click to select your answer(s). ? Save for LaterThis Question: 1 pt 25 of 35 This Quiz: 35 pts possible Question Help The heights, in inches, of the starting five players on a college basketball team are given below. 65 73 75 76 83 Regarding the five players as a population, solve the following problems. a. Compute the population mean height, J. b. Compute the population standard deviation of the heights, o. a. Compute the population mean height, J. H = (Type an integer or a decimal. Do not round.) b. Compute the population standard deviation of the heights, o. 0 = ] (Round to one decimal place as needed.) Enter your answer in each of the answer boxes. ? Save for LaterThis Question: 1 pt 26 of 35 This Quiz: 35 pts possible Question Help Compute the range for the set of data. 13, 14, 15, 16, 17 8 O A. 0.8 O B. 17 O C. 4 O D. 13 Click to select your answer. ? Save for LaterQuiz: QUIZ #3: REVIEW QUIZ FOR EXAM 1 - Ch.1, Ch.2, & Ch 3 Submit Quiz This Question: 1 pt 27 of 35 This Quiz: 35 pts possible Question Help Find the sample standard deviation. Round to one decimal place. 5, 5, 9, 10, 14, 18, 10, 12, 6 O A. 4.3 O B. 18.9 O C. 4.1 O D. 16.8 Click to select your answer. ? Save for LaterThis Question: 1 pt 28 of 35 This Quiz: 35 pts possible Question Help Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 15. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 85 and 115? (b) What percentage of people has an IQ score less than 85 or greater than 115? (c) What percentage of people has an IQ score greater than 145? (a) % (Type an integer or a decimal.) (b) % (Type an integer or a decimal.) (c) % (Type an integer or a decimal.) Enter your answer in each of the answer boxes. ? Save for LaterQuiz: QUIZ #3: REVIEW QUIZ FOR EXAM 1 - Ch.1, Ch.2, & Ch 3 Submit Quiz This Question: 1 pt 29 of 35 This Quiz: 35 pts possible Question Help Often, frequency distributions are reported using unequal class widths because the frequencies of some groups would otherwise be small or very large. Consider the following data, which represent the daytime household temperature the thermostat is set to when someone is home for a random sample of 749 households. Determine the class midpoint, if necessary, for each class and approximate the mean and standard deviation temperature. Click the icon to view the frequency distribution for the daytime household temperature. Class Class Midpoint 61-64 65-67 68-69 70 71-72 73-76 77-80 Round to one decimal place as needed. The sample mean is F. (Round to one decimal place as needed.) The sample standard deviation is |F. (Round to one decimal place as needed.) Enter your answer in each of the answer boxes. ? Save for LaterThis Question: 1 pt 30 of 35 This Quiz: 35 pts possible Question Help The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score? Score Percent of final grade Homework 82 20 Quiz 85 10 Quiz 90 10 Project 99 35 Final Exam 90 25 The student's weighted mean score is|. (Simplify your answer. Round to two decimal places as needed.) Vi More Enter your answer in the answer box. ? Save for LaterThis Question: 1 pt 31 of 35 This Quiz: 35 pts possible Question Help The grades are given for a student for a particular term. Find the grade point average. An A is worth 4 points, a B is worth 3 points, a C is worth 2 points, a D is worth 1 point, and an F is worth 0 points. Grade Credit Hours A D OOP O A. 2.80 O B. 2.40 O C. 3.71 O D. 2.64 Click to select your answer. ? Save for LaterThis Question: 1 pt 32 of 35 This Quiz: 35 pts possible Question Help In a certain city, the average 20- to 29-year old man is 72.5 inches tall, with a standard deviation of 3.1 inches, while the average 20- to 29-year old woman is 64.3 inches tall, with a standard deviation of 3.8 inches. Who is relatively taller, a 75-inch man or a 70-inch woman? Find the corresponding z-scores. Who is relatively taller, a 75-inch man or a 70-inch woman? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) A. The z-score for the woman, , is larger than the z-score for the man, so she is relatively taller. O B. The z-score for the man, , is larger than the z-score for the woman, , so he is relatively taller. O C. The z-score for the woman, , is smaller than the z-score for the man, , so she is relatively taller. O D. The z-score for the man, , is smaller than the z-score for the woman, , so he is relatively taller. Click to select and enter your answer(s). ? Save for LaterThis Question: 1 pt 33 of 35 This Quiz: 35 pts possible Question Help Roughly, when arranged in increasing order, the uppermost 25% of a data set are greater than or equal to Click to select your answer(s). ? Save for LaterThis Question: 1 pt 34 of 35 This Quiz: 35 pts possible Question Help Use the side-by-side boxplots shown to complete parts (a) through (e). X 30 60 90 120 (a) What is the median of variable x? The median of variable x is . (Round to the nearest integer as needed.) (b) What is the third quartile of variable y? The third quartile of variable y is . (Round to the nearest integer as needed.) (c) Which variable has more dispersion? Why? O A. Variable y-the range of variable x is smaller than that of variable y. O B. Variable x-the range of variable y is smaller than that of variable x. O C. Variable x-the interquartile range of variable x is larger than that of variable y. () D. Variable v-the interquartile range of variable v is larger than that of variable x. Click to select your answer(s). Save for LaterUse the sidebyside boxplots sl'lown to complete parts (a) through (e). .+ a .._@ I b 29 O E. Both dispersions are equal. {d} Desorbe the shape oi the variable x. Support your position. Choose the correct answer below. 0 A. Skewed rightthe median is right of center in the box and the left whisker is shorter than the right whisker. O B. There is not entmgh information to determine the shape of the variable x. O C. Syntheticthe median is the oenterof the box and the left and right whiskers are about the same length. 0 D. Skewed leftthe median is left of center in the box and the left whisker is longer than the right whisker. {e} Describe the shape ofthe variable 3!. Support your position. Choose the curred answer below. 0 A. Skewed leftthe median is right of center in the box and the left whisker is longer than the right whisker. O B. There is not entmgh information to determine the shape of the variable y. 0 C. Syntheticthe median is the oenterof the box and the left and right whiskers are about the same length. 0 D. Skewed rightthe median is left of center in the box and the left whisker is shorter than the right whisker. Click to select your answer(a). Save for Later This Question: 1 pt 35 of 35 This Quiz: 35 pts possible iQuestion Help The test scores of 32 students are listed below. Construct and interpret a boxplot for the data. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99 O A. O B. 32 56 69.5 80 99 32 56 69.5 80 95 The data is fairly symmetrical. It is a fairly uniform distribution. The data is fairly symmetrical. It is a fairly uniform distribution. O C. OD. 32 56 69.5 79 99 32 56 69.5 80 99 The data is left-skewed. The data is highly right-skewed Click to select your answer. ? Save for Later