A customer buys 17.01 in gas and requests one five dollar [$5] lottery ticket, two one dollar [$1] lottery tickets, and one [$3]
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Answer:
The 90% confidence level margin of error for this sample mean is 0.42
Step-by-step explanation:
The Human Resources department conduct a random sample of 30 employees
n = 30
Standard deviation =
z = 1.645
Formula of 90% confidence level margin of error for this sample mean=
So, margin of error for this sample mean=
So, margin of error for this sample mean=0.42
Hence the 90% confidence level margin of error for this sample mean is 0.42