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rur the following problems, show all work AND clearly state your conclusion. Use the method that is requested for each proble
5. The mean of a sample of 45 customer satisfaction ratings for a particular video game is 42.95, with a standard deviation o
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Answer #1

Ans:

Ho :μ = 42

HA :μά 42

n=45

sample mean=42.95

sample standard deviation=2.64

Test statistic:

t=(42.95-42)/(2.64/sqrt(45))

t=2.414

df=45-1=44

p-value(2 tailed)=tdist(2.414,44,2)=0.0200

As,p-value<0.1,we reject the null hypothesis

.There is sufficient evidence to conclude that the changes altered the customer rating.

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