A random sample question

label Statistics
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A random sample of 60 items is taken producing a sample mean of 25 and a sample standard deviation of 12.25. What is the value for 95% confidence interval to estimate the population mean?

 

Oct 23rd, 2015

Thank you for the opportunity to help you with your question!

We have been given

  1. Mean,u=25

Standard deviation,d=12.25

The critical value for the 95% confidence interval is,Z= 1.96

The confidence interval is given by the formula,

Lower limit=21.9

Upper limit=28.1



Please let me know if you need any clarification. I'm always happy to answer your questions.
Oct 23rd, 2015

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Oct 23rd, 2015
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Oct 23rd, 2015
Jun 26th, 2017
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