Does quality of communication improve after people are married? Let’s consider a study by Olthoff (1989) who tested the communication quality of engaged couples three months before and again three months after marriage. In this study, 12 couples received ordinary premarital counseling. We will examine the communication quality of the husbands in this study, where higher scores indicate better communication quality. Husband Pre-score Post-score 1 115 126 2 125 133 3 96 126 4 115 115 5 119 108 6 82 109 7 93 124 8 109 98 9 95 95 10 104 120 11 107 118 12 96 128 Therefore, the research hypothesis is that the quality of communication changes after husbands are married. Hint: Make sure you do Post-Pre. Step 1. Express the substantive question as two statistical hypotheses. H0: Answer Answer Answer H1: Answer Answer Answer Step 2. Draw the sampling distribution under the null hypothesis using the p < .05 as the criterion for statistical significance to determine the critical values. What is the center of the distribution? Answer Answer Answer What are the critical values? ± Answer 3 decimal places Step 3. For this data set, you do not have the Table of Descriptive Statistics. Complete the Table of Descriptive Statistics and then compute SE, t-test, 95% CI, and d-effect size. Report the M to TWO decimal places. Hint: Treatment - Control Husband D Deviations Squared Deviations 1 Answer Answer Answer 2 Answer Answer Answer 3 Answer Answer Answer 4 Answer Answer Answer 5 Answer Answer Answer 6 Answer Answer Answer 7 Answer Answer Answer 8 Answer Answer Answer 9 Answer Answer Answer 10 Answer Answer Answer 11 Answer Answer Answer 12 Answer Answer Answer MD = Answer ∑ = Answer SSD = Answer MD Answer S2D Answer SDD Answer nD Answer dfD Answer SE = Answer / SQRT(Answer) = Answer tobs = Answer / Answer = Answer What can we say about the tobs in relation to the p-value and significance? p Answer Answer Hint: What is our alpha level? Our observation Answer statistically significant. We Answer. 95% CI around mean difference = Answer ± Answer(Answer) = (Answer , Answer) What can we say about the CI in relation to the center of the distribution and significance? The 95% CI Answer include zero. Our observation Answer statistically significant. We Answer. dz = Answer / Answer = Answer

Does quality of communication improve after people are married? Let’s consider a study by Olthoff (1989) who tested the communication quality of engaged couples three months before and again three months after marriage. In this study, 12 couples received ordinary premarital counseling. We will examine the communication quality of the husbands in this study, where higher scores indicate better communication quality. Husband Pre-score Post-score 1 115 126 2 125 133 3 96 126 4 115 115 5 119 108 6 82 109 7 93 124 8 109 98 9 95 95 10 104 120 11 107 118 12 96 128 Therefore, the research hypothesis is that the quality of communication changes after husbands are married. Hint: Make sure you do Post-Pre. Step 1. Express the substantive question as two statistical hypotheses. H0: Answer Answer Answer H1: Answer Answer Answer Step 2. Draw the sampling distribution under the null hypothesis using the p < .05 as the criterion for statistical significance to determine the critical values. What is the center of the distribution? Answer Answer Answer What are the critical values? ± Answer 3 decimal places Step 3. For this data set, you do not have the Table of Descriptive Statistics. Complete the Table of Descriptive Statistics and then compute SE, t-test, 95% CI, and d-effect size. Report the M to TWO decimal places. Hint: Treatment - Control Husband D Deviations Squared Deviations 1 Answer Answer Answer 2 Answer Answer Answer 3 Answer Answer Answer 4 Answer Answer Answer 5 Answer Answer Answer 6 Answer Answer Answer 7 Answer Answer Answer 8 Answer Answer Answer 9 Answer Answer Answer 10 Answer Answer Answer 11 Answer Answer Answer 12 Answer Answer Answer MD = Answer ∑ = Answer SSD = Answer MD Answer S2D Answer SDD Answer nD Answer dfD Answer SE = Answer / SQRT(Answer) = Answer tobs = Answer / Answer = Answer What can we say about the tobs in relation to the p-value and significance? p Answer Answer Hint: What is our alpha level? Our observation Answer statistically significant. We Answer. 95% CI around mean difference = Answer ± Answer(Answer) = (Answer , Answer) What can we say about the CI in relation to the center of the distribution and significance? The 95% CI Answer include zero. Our observation Answer statistically significant. We Answer. dz = Answer / Answer = Answer

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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Does quality of communication improve after people are married? Let’s consider a study by Olthoff (1989) who tested the communication quality of engaged couples three months before and again three months after marriage. In this study, 12 couples received ordinary premarital counseling. We will examine the communication quality of the husbands in this study, where higher scores indicate better communication quality.

Husband	Pre-score	Post-score
1	115	126
2	125	133
3	96	126
4	115	115
5	119	108
6	82	109
7	93	124
8	109	98
9	95	95
10	104	120
11	107	118
12	96	128

**Therefore, the research hypothesis is that the quality of communication changes after husbands are married.**

Hint: Make sure you do Post-Pre.

Step 1. Express the substantive question as two statistical hypotheses.

H₀: Answer

Answer

H₁: Answer

Answer

Step 2. Draw the sampling distribution under the null hypothesis using the p < .05 as the criterion for statistical significance to determine the critical values.

What is the center of the distribution? Answer

Answer

What are the critical values? ± Answer

3 decimal places

Step 3. For this data set, you do not have the Table of Descriptive Statistics. Complete the Table of Descriptive Statistics and then compute SE, t-test, 95% CI, and d-effect size.

Report the M to TWO decimal places.
Hint: Treatment - Control

Husband	D	Deviations	Squared Deviations
1	Answer	Answer	Answer
2	Answer	Answer	Answer
3	Answer	Answer	Answer
4	Answer	Answer	Answer
5	Answer	Answer	Answer
6	Answer	Answer	Answer
7	Answer	Answer	Answer
8	Answer	Answer	Answer
9	Answer	Answer	Answer
10	Answer	Answer	Answer
11	Answer	Answer	Answer
12	Answer	Answer	Answer
	M_D = Answer	∑ = Answer	SS_D = Answer

M_D	Answer
S²_D	Answer
SD_D	Answer
n_D	Answer
df_D	Answer

SE = Answer

/ SQRT(Answer) = Answer

t_obs = Answer / Answer = Answer

What can we say about the t_obs in relation to the p-value and significance?

p Answer

Answer

Hint: What is our alpha level?
Our observation Answer statistically significant. We Answer.

95% CI around mean difference = Answer ± Answer(Answer) = (Answer , Answer)

What can we say about the CI in relation to the center of the distribution and significance?

The 95% CI Answer include zero.
Our observation Answer statistically significant. We Answer.

d_z = Answer / Answer = Answer

Step 4. Write an APA conclusion using your by-hand work.

Report all values to TWO decimal places.

On average, husbands' quality of communication is Answer

after marriage compared to before marriage (M_D = Answer; SD_D = Answer ). A Answer showed that the mean difference Answer statistically significant, (t (Answer) = Answer , p Answer Answer ). Also, the 95% CI around the mean difference Answer include zero, (Answer , Answer). The d-effect size indicated there was a Answer treatment effect (d_z = Answer).