A group of Industrial-Organizational psychologists wanted to test if giving a motivational speech at the end of a meeting would encourage office workers to have a higher output to their work based on the numbers of sales each worker made. The researchers used the same 10 participants in both conditions: first data were collected after a regular meeting with no speech, and later after a meeting ending with a motivational speech. Calculate the change in sales using T2 - T1. Here are the sales numbers for the 10 participants in both conditions. Use the four steps of hypothesis testing to find out if the motivational speechincreased sales using the appropriate t-test.

a. State the null and alternative hypotheses. Is it 1 tailed or 2?

b. Find the critical value for this t-test. Which tail is shaded?

c. Perform a related-samples t test.

d. Is there a significant mean difference across conditions? Test using an alpha level of .05. Write conclusion using (test used, significance, include IV and DV, APA stats and direction of any significant difference found.)

Motivational speech T2	No speech T1
4	2
5	1
8	4
7	9
2	0
11	9
9	2
3	3
4	7
10	3

18 enter these data and run the repeated-t test in JASP. Include descriptives and effect size d. Copy the significance table and descriptives table your.