1. Previous research has shown that similes (e.g., she is like a rose) are easie

Question

1. Previous research has shown that similes (e.g., she is like a rose) are easier to understand than metaphors (e.g., she is a rose). Julio wants to replicate this finding using similes and metaphors for emotions. Julio recruits 25 nine-year-old children to participate in his study. Each child is asked to explain the simile "anger is like a volcano" and the metaphor "happiness is a flower." Thus, each child explains two things: the simile and the metaphor. At the end, Julio measures how long (in seconds) it takes for each child to explain them correctly.

Is this an independent-samples or dependent-samples design? If dependent, what kind?

a. Independent

b. Dependent (related samples)

c. Dependent (matched pairs)

d. Dependent (repeated measures)

2. A confidence interval extends from 10 to 14. Would we reject the hypothesis that mu = 13?

a. Yes, reject.

b. No, do not reject.

3. A confidence interval extends from 1 to 3. Would we reject the hypothesis that mu = 2.4?

a. Yes, reject.

b. No, do not reject.

4. Mark is interested in math cognition. He knows that a particular algebra problem takes on average 9 minutes to solve. Now he wants to know whether this time increases or decreases if subjects listen to dance music while they are problem solving. Thus, he will test the null hypothesis that mu is equal to 9 minutes.He conductsan experiment. After ten participants complete the problem, he enters the data into DataGen. Use your calculator to calculate the observed value of t.

Number of observations = 10

Sum of observations = 137

Sum of squared observations = 2953

Sample mean = 1076.1

Standard deviation = 10.93465

Variance = 119.5667

Standard eror = 3.457841

Critical t [0.5] = 2.262157

Confidence int. minimum = 5.877819

Confidence int. maximum = 21.52218

-------------------------------------------------

a. -4.30

b. 0.47

c. 4.30

d. -12.88

e. 0.43

f. 1.14

g. -1.36

h. 12.88

i. -0.47

j. 1.36

5. If the null hypothesis is true, would you expect X-bar and mu to be exactly the same?

a. Yes

b. No

6. For a matched pairs study, the first step is to______

a. divide all scores by the number of groups

b. calculate mean scores for each person

c. calculate difference scores

d. calculate mean scores for each group

7. The observed value of t equals 1.85. The critical value of t equals 2.101. Would you reject the null hypothesis?

a. Yes, reject.

b. No, do not reject.

Explanation / Answer

1. c. Dependent (matched pairs)

2. b) No, we do not reject the null hypothesis

Since interval consist of mu =13, we fail to reject the null hypothesis

3. b) No, we do not reject the null hypothesis

Since interval consit of mu =2.4, we fail to reject the null hypothesis

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