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 are1890, 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.

normal distributionμ = 1490σ = 312

Answered: A standardized exam's scores are…

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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