Name Ch. 2 WH /50 7. (10 points) A set of eight systolic blood pressures follows...

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Name Ch. 2 WH /50 7. (10 points) A set of eight systolic blood pressures follows 110, 123, 132, 150, 127, 118, 102, 122 (a) (4 points) Create a five-number summary of the data (b) (3 points) Clearly identify whether or not there are any outliers in the dataset. Explain your answer using numbers (c) (3 points) Draw a box-plot of the blood pressures 8. (3 points) Suppose that the distribution of speeds at on a city street is bell-shaped with a median of 45 mph and a standard deviation of 1.9 mph. Use the Empirical Rule to complete each sentence _ and- mph. (a) About 68% of vehicles at this location travel between (b) About 95% of vehicles at this location travel between (c) About 997% of vehicles at this location travel between. and- -mph. and- mph. Ch. 2 Fall 2018

Name Ch. 2 WH /50 9. (5 points) The resting heart rates, in beats per minute, of six marathon runners is given by 52, 45, 60,62,48,48 (a) (1 point) Find the mean for these data. (b) (3 points) Find the standard deviation for these data. Show all work. (c) (I point) What is the variance for these data? 10. (6 points) Suppose that the amount spent on textbooks in a semester for college students has a mean of $350. Suppose you spend $450 on textbooks (a) Suppose the standard deviation is $100. Compute the z-score for your $450 textbook purchase. Is spending $450 unusual in this case? Why or why not? (b) Suppose the standard deviation is $25. Compute the z-score for your $450 textbook purchase. Is spending $450 unusual in this case? Why or why not? 11. (3 points) Suppose verbal ACT scores for students admitted to a university are bel-shaped with a mean of 21 and a standard deviation of 3. (a) What is the ACT score such that only 16% of students admitted have a higher score? (b) What is the ACT score such that only 2.5% of students admitted have a lower score? (c) What is the ACT score such that only 0.15% of students admitted have a lower score? Fall 2018 Ch.2

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