I 3. a. N= Group 1 (Pre-Ultima) b. Mean₁= 60 45 45 68 62 70 59 60 44 47 Group 2 (Post-Ultima) *thousandths 45 29 44 21 46 65 29 1. Using Statcrunch, calculate the following statistics for each group. Notice how these can go directly into the formula in #2 and #4. 54 36 29 (whole numbers) Mean₂= 2. Calculate Standard Deviation of the Distribution of before and after difference scores (think of formula): (tenths place) *hundredths Calculate Standard Error of the Difference Between Means = *Make sure you enter your numbers into the t ratio formula as they were listed above.
I 3. a. N= Group 1 (Pre-Ultima) b. Mean₁= 60 45 45 68 62 70 59 60 44 47 Group 2 (Post-Ultima) *thousandths 45 29 44 21 46 65 29 1. Using Statcrunch, calculate the following statistics for each group. Notice how these can go directly into the formula in #2 and #4. 54 36 29 (whole numbers) Mean₂= 2. Calculate Standard Deviation of the Distribution of before and after difference scores (think of formula): (tenths place) *hundredths Calculate Standard Error of the Difference Between Means = *Make sure you enter your numbers into the t ratio formula as they were listed above.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:2.
I
3.
a.
N =
Group 1 (Pre-Ultima)
b. Mean₁.
60
45
45
68
62
70
59
60
44
47
Group 2 (Post-Ultima)
*thousandths
45
29
44
21
46
1. Using Statcrunch, calculate the following statistics for each group. Notice how these can go
directly into the formula in #2 and #4.
65
29
54
36
29
(whole numbers) Mean₂=
(tenths place)
Calculate Standard Deviation of the Distribution of before and after difference scores (think of formula) =
*hundredths
Calculate Standard Error of the Difference Between Means =
*Make sure you enter your numbers into the t ratio formula as they were listed above.
Transcribed Image Text:4.
6.
Calculate the t ratio =
5. Should we use a one-tailed test or a two-tailed test?
7.
*thousandths
What is the critical t (according to Critical Values Table)?
I
Based on the data, can you reject the null hypothesis (Ho)?
One tailed
8.
Use Statcrunch to find the (unadjusted) variance for each group.
Two-tailed
*thousandths
Yes
No
S₂²=
S₁²=
9. Find Spooled first (at thousandths), then report the effect size (Cohen's d):
10. Based on the critical t and Cohen's d, is Ultima effective at lowering depression? Yes No
*thousandths
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