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In: Statistics and Probability

make a list of all the steps needed to calculate a confidence interval using a z-distribution.

make a list of all the steps needed to calculate a confidence interval using a z-distribution.

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Expert Solution

Solution :

All the steps needed to calculate a confidence interval using a z-distribution.

Point estimate = sample mean =

Population standard deviation =

Sample size = n

At 99% confidence level the z is ,

= 1 - 99% = 1 - 0.99 = 0.01

/ 2 = 0.01 / 2 = 0.005

Z/2 = Z0.005 = 2.576

Margin of error = E = Z/2* ( /n)

=

At 99% confidence interval estimate of the population mean is,

- E < < + E

< <

< <

(, )

orchestra answered 2 years ago
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