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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1490 and the standard deviation was 312. The test scores of four students selected at random are 1890, 1250, 2220, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The Z-score for 1890 is (Round to two decimal places as needed.) The Z-score for 1250 is (Round to two decimal places as needed.) The z-score for 2220 is. (Round to two decimal places as needed.) The z-score for 1390 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 1490 and the standard deviation was 312. The test scores of four students selected at random are 1890, 1250, 2220, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The Z-score for 1890 is (Round to two decimal places as needed.) The Z-score for 1250 is (Round to two decimal places as needed.) The z-score for 2220 is. (Round to two decimal places as needed.) The z-score for 1390 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.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1490 and the standard deviation was 312. The test scores of four students selected at random are 1890, 1250, 2220, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The Z-score for 1890 is (Round to two decimal places as needed.) The Z-score for 1250 is (Round to two decimal places as needed.) The Z-score for 2220 is (Round to two decimal places as needed.) The Z-score for 1390 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.) B. 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 1490 and the standard deviation was 312. The test scores of four students selected at random are 1890, 1250, 2220, and 1390. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The Z-score for 1890 is (Round to two decimal places as needed.) The Z-score for 1250 is (Round to two decimal places as needed.) The Z-score for 2220 is (Round to two decimal places as needed.) The Z-score for 1390 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.) B. None of the values are unusual.
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