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population mean using the accompanying...

Construct a 99% confidence interval to estimate the population mean using the accompanying data. What assumptions need to be made to construct this interval?

x=95

σ=15

n=12

What assumptions need to be made to construct this interval?

A.

The sample size is less than 30.

B.

The population mean will be in the confidence interval.

C.

The population must be normally distributed.

D.

The population is skewed to one side.

With 99% confidence, when n=12, the population mean is between the lower limit of nothing and the upper limit of nothing.

(Type an integer or decimal rounded to two decimal places as needed.)Construct a 95% confidence interval to estimate the population mean when x=51 and s = 12.5 for the sample sizes below.

a)

n=24

b)

n=40

c)

n=55

a) The 95% confidence interval for the population mean when n=24 is from a lower limit of nothing to an upper limit of nothing.

(Round to two decimal places as needed.)

b) The 95% confidence interval for the population mean when n=40 is from a lower limit of nothing to an upper limit of nothing.

(Round to two decimal places as needed.)

c) The 95% confidence interval for the population mean when n=55 is from a lower limit of nothing to an upper limit of nothing.

x=95

σ=15

n=12

What assumptions need to be made to construct this interval?

A.

The sample size is less than 30.

B.

The population mean will be in the confidence interval.

C.

The population must be normally distributed.

D.

The population is skewed to one side.

With 99% confidence, when n=12, the population mean is between the lower limit of nothing and the upper limit of nothing.

(Type an integer or decimal rounded to two decimal places as needed.)Construct a 95% confidence interval to estimate the population mean when x=51 and s = 12.5 for the sample sizes below.

a)

n=24

b)

n=40

c)

n=55

a) The 95% confidence interval for the population mean when n=24 is from a lower limit of nothing to an upper limit of nothing.

(Round to two decimal places as needed.)

b) The 95% confidence interval for the population mean when n=40 is from a lower limit of nothing to an upper limit of nothing.

(Round to two decimal places as needed.)

c) The 95% confidence interval for the population mean when n=55 is from a lower limit of nothing to an upper limit of nothing.

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