A researcher wishes to estimate the mean number of miles driven by 4-year-old cars. The population standard deviation of miles driven by all chevy owners is 15,500 milesl how man cars must be sampled so that a 92% confidence interval will have a margin of error of 1000 miles?

The sample size must be approximately 1304.      

Step-by-step explanation:

We are given the following in the question:

Population standard deviation = 15,500 miles

We have to construct a 92% confidence interval with margin of error of 1000 miles.

Margin of error =

Putting values, we get,

The sample size must be approximately 1304.

The correct answer is option C.

Step-by-step explanation:

To calculate density of a substance, we use the equation:

We are given:

Density of liquid = D

Mass of copper= 89.6 g

Volume of copper =

Putting values in above equation, we get:

is the density of copper.