10a) Do customers spend more after the Promotion than they did before (i.e., their Pre versus Post Promotion spending)? Test this question with all the data, then again with only those people who accepted the offer.

10b Does the market research data match the way people really spend in this database? To answer this question, test whether High/Med High spenders actually spend more than Low/Medium Low spenders on the Pre-Promotion values (you can ignore the Average spenders in this analysis). Perform any follow-up tests as appropriate.

Suppose the High-density lipoprotein (HDL) cholesterol levels of 20 subjects were measured before and after the treatment. We want to find out if, in general, the treatment will lead to improvements of health, i.e., increasing the HDL cholesterol level. The mean and standard deviation of the difference are 2.05, 2.837, respectively. We assume the differences follow normal. Use ? =0.05.

Five sophomores were given an English achievement test before and after receiving instruction in basic grammar. The mean difference score is -0.40, and the estimated variance for the difference scores is 8.3. Using the .05 significance level (and five steps of hypothesis testing) is it reasonable to conclude that future students would show higher scores after instruction?
Step I:
-Population 1: -Population 2: -

Research hypothesis:

Null hypothesis:

Step II: Give the characteristics of the comparison distribution -The shape is:

The mean is:
-
Compute the standard deviation using the following

1- Estimated variance of difference scores for sample S2 = 8.3

2-Compute the estimated variance of the distribution of means:
  
3-Compute the estimated standard deviation of the distribution of means:

Step III: What is (are) the cut-off(s)?

Step IV: Determine the sample score position on the comparison distribution

Step V: What is the decision? Write your answer in the APA format.

A test of abstract reasoning is given to a random sample of students before and after they completed a formal logic course. The results are given below. At the 0.05 significance level, test the claim that the mean score is not affected by the course. Before: 74,83,75,88,84,63,93,84,91,77 After: 73,77,70,77,74,67,95,83,84,75 a. Write the null and the alternative hypothesis? b. are the means independent or dependent? explain. c. is it one or two tailed test? d. find the p value? E. write the decision. F. write the conclusion.

QUESTION 2 "Consider a C corporation. The corporation earns $2 per share before taxes. After the corporation has paid its corresponding taxes, it will distribute 50% of its earnings to its shareholders as a dividend. The corporate tax rate is 35%, the tax rate on dividend income is 20%, and the personal income tax rate is set at 28%. How much is the total effective tax rate on the corporation earnings?

QUESTION 6

"Consider a C corporation. The corporation earns $1 per share before taxes. After the corporation has paid its corresponding taxes, it will distribute 0% of its earnings to its shareholders as a dividend. The corporate tax rate is 35%, the tax rate on dividend income is 28%, and the personal income tax rate is set at 28%. How much is the total effective tax rate on the corporation earnings?

16. Cholesterol levels were measured before and after patients were given a drug designed to lower their cholesterol. Test to see if cholesterol dropped with α = 0.01.

a) Determine the null and alternative hypotheses for this scenario.

H0: H1:

b) Determine the level of significance.
c) Check the assumptions for this problem.

d) Determine the test statistic.
e) Determine the p-value.
f) Interpret the p-value.

g) What decision do we conclude based on this information? Interpret this in the context of the problem.

Consider a C corporation. The corporation earns $7 per share before taxes. After the corporation has paid its corresponding taxes, it will distribute 50% of its earnings to its shareholders as a dividend. The corporate tax rate is 35%, the tax rate on dividend income is 28%, and the personal income tax rate is set at 28%. What are the shareholder's earnings from the corporation after all corresponding taxes are paid? Note: Express your answers in strictly numerical terms. For example, if the answer is 5%, enter 0.05 as an answer; or if the answer is $500, write enter 500 as an answer

Calculate the pH of 510. mL of a 8.16×10^-2-M solution of hydrofluoric acid before and after the addition of 7.65×10^-2 mol of potassium fluoride.

pH befor addition =

pH after addition =