In A Random Sample Of Six Microwave Ovens The Mean Repair Cost Was 70 00 And The

in a random sample of six microwave ovens, the mean repair cost was $70.00 and the standard deviation was $12.50. Assume the population is normally distributed and use a t-distribution to construct a 90% confidence level for the population mean.

a) 90%=

b) what is the margin of error?

c) interpret the results?

 

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