Quiz 4a - Measures of Position I - the physics test...

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Introduction to Statistics Quiz #4A Objecitves • You will be able to identify the position of a data value in a data set using the various measures of position such as z - scores, percentiles, deciles, and quartiles. Name___________________________________ Date_______________________ SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) For a final examination on a history test, find the z - score for the value 95, when the mean is 62 and the standard deviation is 7. 2) Test scores for a history class had a mean of 79 with a standard deviation of 4.5. Test scores for a physics class had a mean of 69 with a standard deviation of 3.7. Suppose a student gets a 63 on the history test and a 91 on
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Unformatted text preview: the physics test. Calculate the z-score for each test. On which test did the student perform better relative to the other students in each class? Solve the problem. 3) A teacher gives a 20-point quiz to 10 students. The scores are listed below. What percentile corresponds to the score of 12? 20 8 10 7 15 16 12 19 14 9 4) Find the 25th percentile for the following data: 41, 43, 56, 57, 62, 71, 74, 78, 84, 92, 97. 1 Answer Key Testname: QUIZ 4A ‐ MEASURES OF POSITION I 1) z = 4.71 2) history z-score = -3.56; physics z-score = 5.95; The student performed better on the physics test. 3) 40 4) 56 2...
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