Question 460723: Type I and Type II errors
Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. The mean shopping time,U , spent by customers at the supermarkets has been reported to be 38 minutes, but executives hire a statistical consultant and ask her to determine whether it can be concluded that U is greater than 38 minutes .
To perform her statistical test, the consultant collects a random sample of shopping times at the supermarkets. She computes the mean of these times to be 42 minutes and the standard deviation of the times to be 12 minutes.
Based on this information, answer the questions below.
1.Null hypothesis
2.Alternative hypothesis
3.what is the type 1 error
4.suppose decides to reject the null
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Type I and Type II errors
Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. The mean shopping time,U , spent by customers at the supermarkets has been reported to be 38 minutes, but executives hire a statistical consultant and ask her to determine whether it can be concluded that U is greater than 38 minutes .
To perform her statistical test, the consultant collects a random sample of shopping times at the supermarkets. She computes the mean of these times to be 42 minutes and the standard deviation of the times to be 12 minutes.
Based on this information, answer the questions below.
1.Null hypothesis:::::::::Ho: u = 38
2.Alternative hypothesis::Ha: u > 38
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3.what is the type 1 error: You reject Ho although it is true.
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4.suppose decides to reject the null
What is the question?
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Cheers,
Stan H.
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