Suppose 26% of all small businesses are owned by a particular group of people. In a random sample of 350 small businesses, let x be the number owned by that group. a. Find the mean of x. b. Find the standard deviation of x. c. Find the z-score for the value x = 99.5. d. Find the approximate probability that, in a sample of 350, x is 100 or more.
Suppose 26% of all small businesses are owned by a particular group of people. In a random sample of 350 small businesses, let x be the number owned by that group. a. Find the mean of x. b. Find the standard deviation of x. c. Find the z-score for the value x = 99.5. d. Find the approximate probability that, in a sample of 350, x is 100 or more.
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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Transcribed Image Text:Suppose 26% of all small businesses are owned by a particular group of people. In a
random sample of 350 small businesses, let x be the number owned by that group.
a. Find the mean of x.
b. Find the standard deviation of x.
c. Find the z-score for the value x = 99.5.
d. Find the approximate probability that, in a sample of 350, x is 100 or more.
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