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2. An investment consultation firm claims that it will increase the returns on its clients' investments to an average of 20% of the original investments, with minimal risk involved. In a random sample of 50 clients of the firm, the average return on investments with minimal risk was 18.5% of the original investment, with a standard deviation of 0.5%. a. Find the z-value, rounded to the nearest hundredth. b. Is there enough evidence to reject the firm's claim?

2. An investment consultation firm claims that it will increase the returns on its clients' investments to an average of 20% of the original investments, with minimal risk involved. In a random sample of 50 clients of the firm, the average return on investments with minimal risk was 18.5% of the original investment, with a standard deviation of 0.5%. a. Find the z-value, rounded to the nearest hundredth. b. Is there enough evidence to reject the firm's claim?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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2. An investment consultation firm claims that it will increase the returns on its clients' investments to an average of 20% of the original investments, with minimal risk involved. In a random sample of 50 clients of the firm, the average return on investments with minimal risk was 18.5% of the original investment, with a standard deviation of 0.5%. a. Find the z-value, rounded to the nearest hundredth. b. Is there enough evidence to reject the firm's claim?
Transcribed Image Text:2. An investment consultation firm claims that it will increase the returns on its clients' investments to an average of 20% of the original investments, with minimal risk involved. In a random sample of 50 clients of the firm, the average return on investments with minimal risk was 18.5% of the original investment, with a standard deviation of 0.5%. a. Find the z-value, rounded to the nearest hundredth. b. Is there enough evidence to reject the firm's claim?
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