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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1527 and the standard deviation was 315 The test scores of four students selected at random are 1930, 1270, 2210, and 1400 Find the z-scores that correspond to each value and determine whether any of the values are unusual The z-score for 1930 is (Round to two decimal places as needed.) The z-score for 1270 is (Round to two decimal places as needed.) The z-score for 2210 is (Round to two decimal places as needed) The z-score for 1400 is (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice OA. The unusual value(s) is/are (Use a comma to separate answers as needed.) OB. None of the values are unusual.

A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1527 and the standard deviation was 315 The test scores of four students selected at random are 1930, 1270, 2210, and 1400 Find the z-scores that correspond to each value and determine whether any of the values are unusual The z-score for 1930 is (Round to two decimal places as needed.) The z-score for 1270 is (Round to two decimal places as needed.) The z-score for 2210 is (Round to two decimal places as needed) The z-score for 1400 is (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice OA. The unusual value(s) is/are (Use a comma to separate answers as needed.) OB. None of the values are unusual.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 22PFA
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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1527 and the standard deviation was 315. The test scores of four students selected at random are 1930, 1270, 2210, and 1400. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The Z-score for 1930 is (Round to two decimal places as needed.) The Z-score for 1270 is (Round to two decimal places as needed.) The Z-score for 2210 is (Round to two decimal places as needed.) The Z-score for 1400 is (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The unusual value(s) is/are (Use a comma to separate answers as needed.) OB. None of the values are unusual.
Transcribed Image Text:A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1527 and the standard deviation was 315. The test scores of four students selected at random are 1930, 1270, 2210, and 1400. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The Z-score for 1930 is (Round to two decimal places as needed.) The Z-score for 1270 is (Round to two decimal places as needed.) The Z-score for 2210 is (Round to two decimal places as needed.) The Z-score for 1400 is (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The unusual value(s) is/are (Use a comma to separate answers as needed.) OB. None of the values are unusual.
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