Confidence Interval - Washing Machine
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You work for a consumer advocate agency and want to find the average repair cost of a washing machine. You randomly select 40 repair costs and find the average to be $100.00. The standard deviation is $17.50.
a. Construct a 95% confidence interval for the average repair costs.
b. What if you only selected 25 repair costs? Now construct a 95% confidence interval for the average repair costs.
c. Compare
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Solution Summary
Provides steps necessary to find the confidence intervals.
Education
- BE, Bangalore University, India
- MS, University of Wisconsin-Madison
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