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A standardized exam's scores are normally distributed. In a recent year, the mean te was 1490 and the standard deviation was 313. The test scores of four students sele random are 1870, 1240, 2170, and 1380. Find the z-scores that correspond to each and determine whether any of the values are unusual. The z-score for 1870 is ...

A standardized exam's scores are normally distributed. In a recent year, the mean te was 1490 and the standard deviation was 313. The test scores of four students sele random are 1870, 1240, 2170, and 1380. Find the z-scores that correspond to each and determine whether any of the values are unusual. The z-score for 1870 is ...

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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The z-score for 1870 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 1490 and the standard deviation was 313. The test scores of four students selected at random are 1870, 1240, 2170, and 1380. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1240 is. (Round to two decimal places as needed.) The Z-score for 2170 is (Round to two decimal places as needed.) poss The Z-score for 1380 is (Round to two decimal places as needed.) ssible Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice.
Transcribed Image Text:The z-score for 1870 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 1490 and the standard deviation was 313. The test scores of four students selected at random are 1870, 1240, 2170, and 1380. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1240 is. (Round to two decimal places as needed.) The Z-score for 2170 is (Round to two decimal places as needed.) poss The Z-score for 1380 is (Round to two decimal places as needed.) ssible Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice.
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