8 SCCL MUS Core Lab Take a Test-elion mustafaj-Google Chrome a Secure | https://

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8 SCCL MUS Core Lab Take a Test-elion mustafaj-Google Chrome a Secure | https://www.mathxl.com/Student/PlayerTest.aspx?testld-163690359&centerwin-yes; BBA 303 - SUMMER 2017 Test: Final Test Time Remaining: 01:29:40 Submit Test This Question: 1 pt 1 of 7 (o complete) | This Test: 7 pts possible A standardized exam's scores are normally distributed. In a recent year the mean test score was 1496 and the standard deviation was 312. The test scores of four students selected at random are 1900, 1250 2190, and 1380. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1900 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 2190 is Round to two decimal places as needed) The z-score for 1380 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 vour choice. Click to select your answer(s). ler eHome Google C... Take a Test elion m..

Explanation / Answer

a) z score for 1900 =(X-mean)/std deviation =(1900-1496)/312=1.29

b)z score for 1250 =(X-mean)/std deviation =(1250-1496)/312=.-0.79
c)z score for 2190 =(X-mean)/std deviation =(2190-1496)/312=2.22

d)z score for 1380=(X-mean)/std deviation =(1380-1496)/312=-0.37

2190 appears to be unusual as it is outside of interval of -/+ 2 z score.

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