Answered: An IT consultancy in Singapore that…

Name: An IT consultancy in Singapore that offers telephony solutions to smal
Uploaded: 2024-03-20T07:07:12.000Z
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Description: An IT consultancy in Singapore that offers telephony solutions to small businesses claims that its new call handling software will enable clients to increase suc cessful inbound calls by an average of 75 calls per week. For a random sample of 25 smal

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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An IT consultancy in Singapore that offers telephony solutions to small businesses claims that its new call handling software will enable clients to increase suc cessful inbound calls by an average of 75 calls per week. For a random sample of 25 small-business users of this software, the average increase in successful inbound calls was 70.2 and the sample standard deviation was 8.4 calls. Test, at the 5% level, the null hypothesis that the population mean increase is at least 75 calls. Assume a normal distribution.

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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