section 1: 1)What are the two branches of statistics, and what are they each used for? 2) Are each of the following examples of descriptive

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section 1:

1)What are the two branches of statistics, and what are they each used for?

2) Are each of the following examples of descriptive or inferential statistics?

a. M

b. t

c. F

d. SD

e.

3) A sample of 200 college students are asked about how much time they spend studying for classes each week. The results show that the sample has a mean of 15 hours with a standard deviation of 5 hours. Explain these findings for someone who has never taken a statistics class before. Note that your job is to interpret the findings, NOT to explain how they were calculated!

4) We have discussed a number of different types of hypothesis tests this quarter, but all of them use the same four general steps. What are those four steps? Make sure to not only name the steps, but describe what happens in each step.

5) In hypothesis testing, we state two different hypotheses. What are they? As researcher, which do we believe to be true? Which do we assume to be true at first and put to the test?

6) What is the role of the critical value in hypothesis testing?

7) What does it mean to say that a test result is statistically significant? What is a p-value, and how does it relate to statistical significance?

8) Your friend tells you that they found a "statistically significant" result, so it must be important. How would you respond to your friend?

Section 2: MatchingInstructions: Identify which statistical test is most appropriate for the following scenarios. Each option will only be used once. (2 points each)

A. One sample t-testD. ANOVA

B.Independent samples t-test E. Chi- square goodness offit test

C. Related samples t-testF.chi-square test of independence

1. A researcher wants to compare the mean effects for two different medications for anxiety by randomly assigning participants to receive one or the other.

2. A city manager wonders whether there is a relationship between whether residents would be in favor of or oppose a new bill, and whether they live in a rural, suburban, or urban area.

__________3. A market analyst wants to determine whether a sample has a preference for one of five types of designs for a new company logo by having each person vote for their favorite.

_4. A market analyst wants to determine whether a sample has a preference for one of five types of designs for a new company logo by having them rate how much they like/dislike each logo, and comparing the mean rating for each logo.

__________5. A school administrator wonders whether there is a students are more engaged in their Math classes than their English classes by comparing students' mean Math scores with their mean English scores.

__________6. A researcher wants to know whether the mean amount of smog in her city is significantly higher than the national average.