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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1495 and the standard deviation was 320. The test scores of four students selected at random are 1890, 1240, 2220, and 1380. 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.)

A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1495 and the standard deviation was 320. The test scores of four students selected at random are 1890, 1240, 2220, and 1380. 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.)

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 1495 and the standard deviation was 320. The test scores of four students selected. t random are 1890, 1240, 2220, and 1380. 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 two decimal places as needed.).
Transcribed Image Text:A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1495 and the standard deviation was 320. The test scores of four students selected. t random are 1890, 1240, 2220, and 1380. 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 two decimal places as needed.).
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