A research reported that about 70% of the general consumer population is loyal to their supermarkets. Suppose you check a simple random sample of 120 customers and found 91 of them are loyal to their supermarkets. We would like to conduct a test of the claim that the population of consumers are loyal to their supermarket is more than 70%. Check the assumption if we can approximate by normal distribution. a. No, since np > 10 and nq > 10 b. Yes, since np > 10 and nq > 10 c. No, since np > 10 and nq < 10 d. Yes, since np < 10 and nq < 10

A research reported that about 70% of the general consumer population is loyal to their supermarkets. Suppose you check a simple random sample of 120 customers and found 91 of them are loyal to their supermarkets. We would like to conduct a test of the claim that the population of consumers are loyal to their supermarket is more than 70%. Check the assumption if we can approximate by normal distribution. a. No, since np > 10 and nq > 10 b. Yes, since np > 10 and nq > 10 c. No, since np > 10 and nq < 10 d. Yes, since np < 10 and nq < 10

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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Question

a. No, since np > 10 and nq > 10

b. Yes, since np > 10 and nq > 10

c. No, since np > 10 and nq < 10

d. Yes, since np < 10 and nq < 10

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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