Amy is testing to see if UCI students are smarter than average. She gets a sample...
Amy is testing to see if UCI students are smarter than average. She gets a sample of 20 UCI students. Their average IQ is 118. The average IQ of all people is 100; therefore, the null hypothesis is µ = 100. We are testing to see if the mean is 100. Precisely what mean are we talking about? Explain who it is the mean of.
Homework Answers
H0: Population Mean µ = 100
H1: Population Mean µ not = 100
Let the los be alpha = 5%
Critical z: 1.6449
P-Value: 0.0000
Here Z value is greater than Z critical value and P-value >
alpha 0.05 so we reject H0
Thus we conclude that Population Mean µ not = 100 i.e. The average IQ of all people is not 100
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