Question

A NAPA Auto Parts supplier wants information about how long car owner plan to keep their cars. A random sample of 35 car owners results in
a sample average of 7.01 years and a standard deviations of 3.74 years. Assume that the sample is drawn from a normally distributed population.

Find a 95% confidence interval estimate of the population mean

• P – PARAMETER
  • Describe the parameter in context. This should be a complete sentence

• A – ASSUMPTIONS
  • Are we allowed to construct an interval and why?

• N – NAME THE INTERVAL
  • State what command you will be using the compute the interval along with the values you need.

• I – INTERVAL CALCULATION
  • Find the interval

• C – CONCLUSION
  • Write a sentence summarizing what you have found.

Answer 1

Let me know in the comment section if anything is not clear. I will reply ASAP!

If you like the answer, please give a thumbs-up. This will be quite encouraging for me.Thank-you!