# What properties of water affect its ability to store heat and to dissolve ions and oxygen?, accounting homework help

**Part 1: Confidence Intervals **

- Why

is it often impossible to know the actual value of any population

parameter? Give an example of a population parameter that you cannot

calculate, but that you can estimate. - A sample can be used to

estimate a population parameter. How does the sample size affect the

estimate? If the sample is larger, what will this do to the error E? - Use

the Confidence Interval formula above and calculate the 95% confidence

interval for any population mean of your choice. Write down (invent) the

sample size (be sure it is 30 or above), the sample mean, and the

sample standard deviation. Then, calculate the confidence interval.

Remember, you are inventing all the values, so no two posts should look

the same. - Use Excel and your invented values to calculate the

confidence interval. Include and compare the results. (Tutorials can be

found in Doc Sharing). Again, remember that your sample size must be 30

or above.