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

Part 1: Confidence Intervals

1. 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.
2. 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?
3. 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.
4. 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.