Majesty Video Production, Inc. wants the mean length of its advertisements to be 31 seconds. Assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. Suppose we select a sample of 19 ads produced by Majesty. a) What is the standard error of the mean time? b) What percent of the sample means will be greater than 31.75 seconds? c) What percent of the sample means will be greater than 30.25 seconds? d) What percent of the sample means will be greater than 30.25 seconds but less than 31.75 seconds?
Majesty Video Production, Inc. wants the mean length of its advertisements to be 31 seconds. Assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. Suppose we select a sample of 19 ads produced by Majesty. a) What is the standard error of the mean time? b) What percent of the sample means will be greater than 31.75 seconds? c) What percent of the sample means will be greater than 30.25 seconds? d) What percent of the sample means will be greater than 30.25 seconds but less than 31.75 seconds?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Majesty Video Production, Inc. wants the
a) What is the standard error of the mean time?
b) What percent of the sample means will be greater than 31.75 seconds?
c) What percent of the sample means will be greater than 30.25 seconds?
d) What percent of the sample means will be greater than 30.25 seconds but less than 31.75 seconds?
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