1 12 Points For The Data Set X 56 34 32 35 21 18 44 52 45 33 34 42 51 21 24 A 4 Points Sketch Th 1 (159.76 KiB) Viewed 13 times
1 12 Points For The Data Set X 56 34 32 35 21 18 44 52 45 33 34 42 51 21 24 A 4 Points Sketch Th 2 (92.13 KiB) Viewed 13 times
1. (12 points) For the data set X = 56, 34, 32, 35, 21, 18, 44, 52, 45, 33, 34, 42, 51, 21, 24: (a) (4 points) Sketch the box and whisker plot for this data. (b) (4 points) What is the z-score of the value 18? Values with a z-score greater than 2 or less than -2 are considered unusual. Is 18 unusual? 2. (4 points) Which of the following histograms shows a data set with the greatest standard deviation? All three histograms are created from 1000 data values. 100 NO 40 20 5. (5 points) Sunn. -10 20 350 B. Those who attended community colleges in the US. C. Those who graduated from Oakton D. Those who graduated from community colleges in the U.S. 300 A. B. C. I 3. (8 points) For each situation, sketch what you think the historgram of the population data should look like, and explain why you think it should be that way. (That is, if we collect the data for everyone in the population, and then create a histogram, what should it look like?) (a) (4 points) We collect data on the length of time (in days) that it takes people to recover from the flu. (b) (4 points) We collect data on the % body fat for 25 year old males. 250 200 100 -10 10 4. (5 points) A random sample of graduates of Oakton is obtained, and they are surveyed about their happiness with their choice of Oakton. These results can be generalized to make statements about which group of people? (Choose only one answer.) A. Those who attended Oakton. 30
10. (9 points) A bag contains 8 marbles. (a) (3 points) How many ways could we select 5, without replacement, if the order matters. (b) (3 points) How many ways could we select 5, without replacement, if the order doesn't matter. (c) (3 points) How many ways could we select 5, with replacement, if the order matters. (d) (Extra Credit) How many ways could we select 5, with replacement, if the order doesn't matter. 11. (8 points) Suppose that in the population, on a certain measurement, the mean is = 56.2 and the standard deviation is σ = 8.1. Would it be considered unusual if a random sample of n = 81 had a sample mean of o = 60.3? I
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!