Asked Apr 24, 2019

A simple random sample of 35 cars and trucks in Vermont have a mean price of $18,702 with a standard deviation of $10,653. 

What would be the constructed 95% confidence interval for the mean price for all cars and trucks in Vermont? 


Expert Answer

Step 1

In this question, we have given information

35 cars and trucks in Vermont have mean $18702 and standard deviation $10653.

Using this information we have to find the 95% confidence interval for man price of all cars and trucks in Vermont.  

Step 2

Note::  Since the sample size is greater than 30, so we have used Z distribution to get the confidence interval. 

We use t distribution, only when the sample size is less than 30 and population standard devitaion is unknown.

Here ...


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