Can you show the work A researcher is interested in whether completing a crosswo

Question

Can you show the work A researcher is interested in whether completing a crossword puzzle each day improves people's executive functioning skills (e.g., memory). The study used a sample of 9 participants who completed a memory test before and after a 4-week period in which they completed a crossword every day. The mean of the difference scores for memory was 3.0 and the sum of squares (SS) for the difference scores was 144. An alpha level of 05 was set by the researcher. 24. What type of t-test should you do? a. Independent-samples b. Related-samples (repeated-measures) c. One-sample 25. Is this a one-tailed or two-tailed test? a. one-tailed b. two-tailed 26. State the alternative hypothesis in notation form. 27. Find the degrees of freedom (d)- SHOW YOUR WORK b. 8 c. 18 d. 19 28. Find the t-critical value-DESCRIBE WHAT INFORMATION YOU USED BELOW

Explanation / Answer

24)
option B) related sample is correct
as sample remain same before and after for completing memory test

25)
a)one tailed
as we want see if memory score improves or increase
which is right tailed test

26)
option C)

as we want see if memory score improves or increase

27)
df = n-1 = 9-1 =8
B) is correct

28)
right tailed test
alpha = 0.05
df = 8
=T.INV(0.95,8)
= 1.895

C) is correct

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