a. according to the irs individuals filling federal income tax returns pror to march 31 received an average refund of $1,078 in 2018. consider the population of last- minutes files  who mail their tax return during the last five days of income tax period (typically april 10 to april 15)   b.for a sample of 400 individuals who filed a tax return between april 10 and 15 the sample mean fefund was $920 based on prior experience a population standard devition  1,800 what is p-value?   c.using a= 0.05 can you  conclude that population mean  refund   for last minutes filiters is less than the population mean refund for early filers?

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a. according to the irs individuals filling federal income tax returns pror to march 31 received an average refund of $1,078 in 2018. consider the population of last- minutes files  who mail their tax return during the last five days of income tax period (typically april 10 to april 15)

 

b.for a sample of 400 individuals who filed a tax return between april 10 and 15 the sample mean fefund was $920 based on prior experience a population standard devition  1,800 what is p-value?

 

c.using a= 0.05 can you  conclude that population mean  refund   for last minutes filiters is less than the population mean refund for early filers?

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