I am a student currently taking a stats class, and having trouble with test statistics. For some reason this stuff just does not compute in my brain. I was wondering if anyone knew off the top of their heads the equations needed for a couple problems I have to complete. I have a list of equations, but they are all for proportions and I have a feeling they are not the equations that I need (this is what I get for being out of class for a week due to swine flu, eeek!).

Problem 1:

A study found that the mean number of hours of TV watched per day was 4.09 for black (N=101, Standard Error = 0.3616) and 2.59 for white (N=724, Standard Error = 0.0859).

a. What type of test should you run?

b. Construct Hypotheses

c. Conduct a significance test using an alpha-level of 0.01 and interpret.

d. interpret your P value

e. Construct a confidence interval and interpret.

f. Interpret as a ratio.

Problem 2:

An experiment of responses for noise detection under 2 conditions used a sample of twelve 9-month old children. The study found a sample mean difference of 70.1 and a standard deviation of 49.4 for the difference.

a. What type of test should you run?

b. Construct Hypotheses

c. Conduct a significance test using an alpha-level of 0.01 and interpret.

d. interpret your P value

e. Construct a confidence interval and interpret.

If anyone could help me - it would be MUCH APPRECIATED!

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