The mean score of a competency test is 90, with a standard deviation of 4. Between what two values do about 95% of the valueslie? (Assume the data set has a bell-shaped distribution.)O Between 98 and 94O Between 78 and 102O Between 74 and 106Between 82 knd 98

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 137 adult males, the mean pulse rate is 70.2 bpm and the standard deviation is 10.7 bpm. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)
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The mean score of a competency test is 90, with a standard deviation of 4. Between what two values do about 95% of the values lie? (Assume the data set has a bell-shaped distribution.) O Between 98 and 94 O Between 78 and 102 O Between 74 and 106 • Between 82 knd 98