Question & Corpt 03 98 0 Details Data was collected for 300 fish from the North Atlantic. The length of the fish (in mm) is summarized in the GFDT below. Lengths (mm) Frequency 120 - 12 125 - 129 16 130 - 134 71 135 - 139 108 140 - 144 145 - 149 18 150 - 154 What is the lower class boundary for the first class? dass boundary = Submit Question Jump to Answer Question 7 Corpt 03 99 0 Details 110 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 15 0.1364 15 0.1636 2 11 0.1 44 3 9 0.0818 53 13 0.1182 66 16 0.1455 82 17 99 11 0.1 110 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 2 times per week? Submit Question Jump to Answer Question & Corpt 03 99 0 Details Ages Number of students 15-18 19-22 23-26 27-30 31-34 35-38 Find the relative frequency for the class with lower class limit 31 Relative Frequency = Give your answer as a percent, rounded to two decimal places Submit Question Jump to Answer Question 9 Go/ pt 03 99 0 Details The following data represents the age of 30 lottery winners. 23 28 33 33 34 35 40 41 61 64 56 67 68 70 74 76 81 Complete the frequency distribution for the data. Frequency 20-29 30-39 40-49 50-59 50-69 70-79 Submit Question Jump to Answer Question 10 Corpt 03 99 0 Details In a student survey, fifty-two part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your arewer to 4 decimal places for the Relative Frequency if possible. # of Courses Frequency | Relative Frequency | Cumulative Frequency 0.2853 2 0.3269 32 52 What percent of students take exactly three courses? Submit Question Jump to AnswerQuestion 26 Corpt 03 99 0 Details Temperatures in June in the Paradise City are distributed nearly normally with mean 79 degrees and standard deviation 7 degrees F. Which of the following temperatures would be considered unusual? 0 93.7 OBE.1 0 82.5 076.9 075.5 Submit Question Jump to Answer Question 27 Co/ pt 03 99 0 Details The heights of adult men in America are normally distributed, with a mean of 69.2 inches and a standard deviation of 2.62 inches. The heights of adult women in America are also normally distributed, but with a mean of 64.7 inches and a standard deviation of 2.58 inches. a. If a man is 6 feet 3 inches tall, what is his z-score (to 4 decimal places]? b. If a woman is 5 feet 11 inches tall, what is her 2-score (to 4 decimal places)? c. Who is relatively taller? The & foot 3 inch American man OThe 5 foot 11 inch American woman Submit Question Jump to Answer question 28 Cort pt 03 99 0 Details In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School |Mean Test Score | Number of ninth graders (Frequency) Glenwood 77 Central 92 316 Lincoln 71 168 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 77, 92, and 71, which is 80. Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. Mean of all ninth grader's scores = Submit Question Jump to Answer question 29 Co/ pt 03 99 0 Details Which statistic [mean, median, or mode) is most appropriate in each of the following situations? 2. Tables in the dining hall are numbered 1 through 12 for students who eat there. The principal calls out a number for the table that will go through the buffet line first. The other tables follow in order of the table numbers. One student is sure the principal calls certain tables more often. She keeps track of which numbers are called over a 21-day period. O Mean O Median O Mode b. The offensive line of a football team is larger than in previous years. The program will list a statistic to show this fact. O Mean O Median O Mode C. A reporter is doing a story on the falling prices of homes in a large neighborhood. The reporter wants to demonstrate how the prices have fallen for the typical home, not just the most expensive houses. O Mean O Median O Mode Submit Question Jump to Answer Question 30 Corpt 03 99 0 Details Find the range for this list of numbers 45 6 2 22 70 86 38 20 38 10 42 87 92 15 52 Range = Submit Question Jump to AnswerQuestion 31 Corpt 03 99 O Details In parts [a) and (b), identify whether the events are Mutually Exclusive, Independent, or Neither (events cannot be both disjoint and independent). al You and a randomly selected student from your class both earn A's in this course. Independent Mutually Exclusive Neither b) You and your class partner both earn A's in this course. Neither O Mutually Exclusive Independent ci If two events can occur at the same time, they must be independent. False O True Submit All Parts Jump to Answer question 32 Corpt 03 99 0 Details A geneticist conducts an experiment with peas, one sample of offspring consisted of 461 green peas and 153 yellow peas. Based on these results, estimate the probability of getting an offspring pea that is green. Report the answer as a percent rounded to two decimal place accuracy. [You need not enter the "%" symbol] Probability = Is the result reasonably close to the value of _ that was expected? Ono Submit Question Jump to Answer question 33 Corpt 03 99 0 Details A ball is drawn randomly from a jar that contains 7 red balls, $ white balls, and $ yellow balls. Find the probability of the given event, and show your answers rounded to 4 decimal places when possible. a. A red ball is drawn. Pyred) = b. A white ball is drawn. P(white) = C. A yellow ball or red ball is drawn. Plyellow or red) = Submit Question Jump to Answer Question 34 Corpt 03 99 0 Details Giving a test to a group of students, the grades and gender are summarized below Grades vs. Gender ABC Male 15 Female 19 18 17 If one student was chosen at random, find the probability that the student got a C. Probability = (Round to 4 decimal places) Submit Question Jump to Answer Question 35 Bort pt 03 99 0 Details Giving a test to a group of students, the grades and gender are summarized below Grades vs. Gender ABC Male Female 20 2 17 If one student was chosen at random, find the probability that the student was male. Probability = (Round to 4 decimal places) Submit Question Jump to Answer question 36 Corpt 03 99 0 Details With one method of a procedure called acceptance sampling, a sample of items is randomly selected without replacement and the entire batch is accepted if every item in the sample is okay. The ABC Electronics Company has just manufactured 1530 write-rewrite CDs, and 60 are defective. If 3 of these CDs are randomly selected for testing, what is the probability that the entire batch will be accepted? Rounded to four decimal place accuracy. Submit Question Jump to Answerquestion 37 Co/1 pt 03 # 99 0 Details In a large population, 62% of the people have been vaccinated. If 4 people are randomly selected, what is the probability that AT LEAST ONE of them has been vaccinated? Give your answer as a decimal to 4 places. Submit Question Jump to Answer question 35 Corpt 13 99 0 Details A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted randomized controlled study where is females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that s specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below [Allais, 201 1)- ( round answers to 2 decimal places) Pain Free: Yes | Pain Free: No | Total Treatment 10 33 Control Total 12 77 69 a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? b) What percent of patients in the control group were pain free after 24 hours? c] At first glance, does acupuncture appear to be an effective treatment for migraines? Explain your reasoning. Oyes, because a higher percentage of individuals in the treatment group were pain-free after 24 hours Ono, because there were fewer people in the treatment group Ono, because more than half of the individuals in the treatment group still experience pain 24 hours later Oyes, because more individuals in the treatment group were pain-free after 24 hours d) Do the data provide convincing evidence that there is a real pain reduction for those patients in the treatment group? Or do you think that the observed difference might just be due to chance! It is impossible to tell merely by comparing the sample proportions because the difference could be the result of random error in our sample Yes, 23% is much higher than 4% Submit Question Jump to Answer Question 39 Corpt 03 99 0 Details The table summarizes results from 984 pedestrian deaths that were caused by automobile accidents. Pedestrian Death Driver Pedestrian Intoxicated? Intoxicated? N 74 No 215 635 If one of the pedestrian deaths is randomly selected, find the probability that the driver was intoxicated. Please enter a decimal to 4 places. Submit Question Jump to Answer Question 40 Corpt 03 99 0 Details The table summarizes results from 978 pedestrian deaths that were caused by automobile accidents. Pedestrian Deaths Driver Pedestrian Intoxicated? Intoxicated? N TCS 64 65 No 568 If one of the pedestrian deaths is randomly selected, find the probability that both the pedestrian and the driver were intoxicated. Please enter a decimal to 4 places. Submit Question Jump to Answer Question 41 Corpt 03 99 0 Details 15 cards are selected out of a 52 card deck such that after each card is selected, it is placed back into the deck and the deck is reshuffled. Then the total number of hearts selected follows a binomial distribution. O true Ofalse Submit Question Jump to Answer Question 42 Corpt 03 99 0 Details If a business owner, who is only interested in the bottom line, computes the expected value for the profit made in bidding on a project to be -$3,000, then this owner should not bid on this project. false true Submit Question Jump to