In a random sample of five microwave​ ovens, the mean repaircost was $60.00 and the standard deviation was $11.50
Assume the population is normally distributed and use a​t-distribution to construct a 90​% confidence interval for thepopulation mean μ. What is the margin of error of μ​? Interpret theresults.
(a)The confidence interval for the population mean is _,_  ​(Round to one decimal place as​ needed.)
(b)The margin of error is _ ​(Round to two decimal places as​needed.)
(c) Interpret the results. Choose the correct answer below:
1. It can be said that 95​% of microwaves have a repair costbetween the bounds of the confidence interval.
2.With 95​% confidence, it can be said that the population meanrepair cost is between the bounds of the confidence interval.
3.With 95​% confidence, it can be said that the repair cost isbetween the bounds of the confidence interval.
4.If a large sample of microwaves are taken approximately 95​%of them will have repair costs between the bounds of the confidenceinterval.
