a) What is the probability a randomly selected student will read more than 88 WPM? b)What is the probability that a random sample of 25 second grade students results in a mean reading rate of less than 79 WPM? c)What is the probability that a random sample of 17 second grade students results in a mean reading rate of more than 86 WPM?
a) What is the probability a randomly selected student will read more than 88 WPM? b)What is the probability that a random sample of 25 second grade students results in a mean reading rate of less than 79 WPM? c)What is the probability that a random sample of 17 second grade students results in a mean reading rate of more than 86 WPM?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 16HP
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The reading speed of second grade students is approximately normal, with a mean 83 WPM and a standard deviation of 11 WPM. (Please round your answer to 4 decimal places )
a) What is the probability a randomly selected student will read more than 88 WPM?
b)What is the probability that a random sample of 25 second grade students results in a mean reading rate of less than 79 WPM?
c)What is the probability that a random sample of 17 second grade students results in a mean reading rate of more than 86 WPM?
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