1.) Suppose that the population mean and population variance of per capital health care expenditure are...

1.) Suppose that the population mean and population variance of per capital health care expenditure are $11,000 and 9, respectively. What is the probability that the sample mean from a random sample sample of size 900 is within .1 of the population mean? (round to 3 digits)

_______________________________________________

2.)

We have a random sample of 45 customer satisfaction surveys. Customer satisfaction is coded as

-2 for ”Really unhappy with service”

-1 for ”Unhappy with service”

0 for ”Okay with service”
1 for ”Happy with service”
2 for ”Really happy with service”

The sample mean is 1.3. The sample variance is 9. What is the left end point of a 98% confidence interval

for the population customer satisfaction? (Two digits after the decimal point)

Expert Solution

orchestra answered 1 year ago

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