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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Answered: The mean score of a competency test is…

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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Scores on a standardized exam are normally distributed with a mean of 529 and a standard deviation of 50. The figure below shows the distribution of the scores on a standardized exam. Calculate the shaded area under the curve. Express your answer in decimal form accurate to at least two decimal places. Answer: 562.5 The Scores on a Standardized Exan 629
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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 164 adult males, the mean pulse rate is 70.5 bpm and the standard deviation is 10.9 bpm. Find the value of the test statistic. The value of the test statistic is. (Round to two decimal places as needed.)
he average age of vehicles registered in the United 96 months. Assume the population is normally distrib a standard deviation of 15 months. Find the probabil he mean age of a cample o of 26 ul
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Assume that adults have IQ scores that are normally distributed with a mean of u= 100 and a standard deviation o = 15. Find the probability that a randomly selected adult has an IQ less than 118. Click to view page 1 of the table Click to view page 2 of the table The probability that a randomly selected adult has an IQ less than 118 is (Type an integer or decimal rounded to four decimal places as needed.)
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IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the x-score that corresponds to a z-score of 2.33. O A. 139.55 B. 142.35 OC. 125.95 D. 134.95 nswer. DII F11 F10 公

I need help with parts b,c, and d please B is not 992

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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