A market researcher analyzes how many electronics devices customers buy in a single purchase. The distribution has a mean of three with a standard deviation of 0.7. She samples 400 customers. What is the z-score for Σx = 1,172? (Enter an exact number as an integer, fraction, or decimal.) B. An unknown distribution has a mean of 100, a standard deviation of 100, and a sample size of 100. Let X = one object of interest. What is the mean of ΣX? (Enter an exact number as an integer, fraction, or decimal.)
A market researcher analyzes how many electronics devices customers buy in a single purchase. The distribution has a mean of three with a standard deviation of 0.7. She samples 400 customers. What is the z-score for Σx = 1,172? (Enter an exact number as an integer, fraction, or decimal.) B. An unknown distribution has a mean of 100, a standard deviation of 100, and a sample size of 100. Let X = one object of interest. What is the mean of ΣX? (Enter an exact number as an integer, fraction, or decimal.)
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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A.
A market researcher analyzes how many electronics devices customers buy in a single purchase. The distribution has a mean of three with a standard deviation of 0.7. She samples 400 customers.
What is the z-score for
Σx = 1,172?
(Enter an exact number as an integer, fraction, or decimal.)
B.
An unknown distribution has a mean of 100, a standard deviation of 100, and a sample size of 100. Let X = one object of interest.
What is the mean of ΣX? (Enter an exact number as an integer, fraction, or decimal.)
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