Exercise 29 - Statistics work book
SUMITHA THOMAS
GRAND CANYON UNIVERSITY

Exercise 29 - Statistics work book

Name:____Sumitha K Thomas________________________________________ Class: ____________________ Date: ___3/10/2013______________________________________________________________________________ □ EXERCISE 29 Questions to be Graded

1.Were the groups in this study independent or dependent? Provide a rationale for your answer.
Groups are independent in this study. According to the above data independent groups define as if the two sets of data were not taken from the same subjects and if the scores are not related. In this study subjects are two different genders which is men and women and scores are not even related each other. Therefore this is an independent study. 2.t = −3.15 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer.

T = -3.15 describes the mental health variability. This is a significant value because it’s provides the degree of freedom. According to the data above the significance of a t ratio can be determined by comparison with the critical values in a statistical table for the t distribution using the degree of freedom for the study. The value is significant because p value of it is 0.002 which is smaller than alpha value set for this test that is 0.05 3.Is t = −1.99 significant? Provide a rationale for your answer. Discuss the meaning of this result in this study.

t = -1.99 is significant because it represent health functioning variables between men and women which compares men and women for perceived coping, quality of life and social support. Smaller P value indicates more significant findings. The P value for health functioning is 0.049 which is smaller than the alpha level 0.05 in this study. 4.Examine the t ratios in Table VI. Which t ratio indicates the largest difference between the males and females post MI in this study?...

...9Name: Brielle Cantagallo Class: Statistics
Date: 3/17/13
□ EXERCISE29 Questions to be Graded
* 1.Were the groups in this study independent or dependent? Provide a rationale for your answer.
The groups in this study were independent because the two sets of data were not taken from the same subjects. The subjects were in one group: female and the second group: male.
* 2.t = −3.15 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer.
t= -3.15 describes the difference between men and women for the variable of mental health. This value is significant because 0.002 is less than the alpha type 1 error rate of 0.05 that was used.
* 3.Is t = −1.99 significant? Provide a rationale for your answer. Discuss the meaning of this result in this study.
t= -1.99 is significant because it shows that the physical functioning and health functioning of both the men and women in this study were almost the same across the board. The p value of 0.049 was also the same in each of these variables concluding that the type 1 error rate for this was less than the alpha 0.05 that was set for this study.
* 4.Examine the t ratios in Table VI. Which t ratio indicates the largest difference between the males and females post MI in this study? Is this t ratio significant? Provide a rationale for your answer.
The t ratio that was the largest difference between males...

...EXERCISE29 Questions to be Graded
1. Were the groups in this study independent or dependent? Provide a rationale for your answer.
The two groups were independent since they were formed based on gender with no intent to match subjects on any variable. The men and women selected didn’t share any relationship or live in the same location.
2. t = −3.15 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer.
In this study, t= -3.15 describes the mental health variable. It is significant because they are the variables being tested since the p value is 0.002 and the alpha is 0.05, the difference can cause the null hypothesis to be rejected.
3. Is t = −1.99 significant? Provide a rationale for your answer. Discuss the meaning of this result in this study.
It is significant because the p= 0.049 value is smaller than the alpha that was set for this study (0.05). This means that there is a significant difference in the results obtained from men and women and this supports the experiment that was performed.
4. Examine the t ratios in Table VI. Which t ratio indicates the largest difference between the males and females post MI in this study? Is this t ratio significant? Provide a rationale for your answer.
The t ratio for mental health is t= -3.15, which indicates the largest difference between men and women post MI in this study. It is significant...

...1. Were the groups in this study independent or dependent? Provide a rationale for your answer.
Independently due to the data being collected independently
2. t = −3.15 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer.
t = -3.15 describes mental health in this study. This is significant because mental health plays a big role in the outcome of MI patients.
3. Is t = −1.99 significant? Provide a rationale for your answer. Discuss the meaning of this result in this study.
t = -1.99 describes health functioning. This is very significant. It is used to describe decline from illness or disease. It could solely explain change in quality of life post MI.
4. Examine the t ratios in Table VI. Which t ratio indicates the largest difference between the males and females post MI in this study? Is this t ratio significant? Provide a rationale for your answer.
Mental health revealed the largest difference between the males and females post MI in this study. This is significant because it truly reveals that men and women cope differently. I also believe this value would be inaccurate due to men being less likely to admit that they have mental health issues.
5. Consider t = −2.50 and t = −2.54. Which t ratio has the smaller p value? Provide a rationale for your answer. What does this result mean?
-2.54 has the smaller p value at 0.007. It shows the health outcome between...

...Annamma Thomas
Exercise29
1. The groups were independent because the men and women participating in the experiment did not share any relationships and their quality of life tests were totally independent of one another.
2. The variable described by this number is mental health. Since the P value is .002 and the alpha is .05, the difference can cause the null hypothesis to be rejected.
3. The T-Value is significant because the P value is .049 which is the closest to the alpa which is .05. Since this is one of the values that allows the selected hypothesis to be correct the significance is support to the performed experiment.
4. The mental health variable seems to have the biggest difference between men and woman. The t-score shows a -3.15 difference and although this seems huge the P-score diminishes the amount of certainty thee data provides since it is significantly lower than the alpha.
5. The t=-2.54 has a smaller P-Score. This shows that the physical component score has a lot more to do with the quality of life function within men and woman.
6. A type I error is when a true null hypothesis is rejected. Certain variables that have a P-score that is lower than the alpha would need multiple trials to ensure that the null hypothesis should be rejected since outliers are a commonality and multiple trials ensure that data is correct.
7. A Bonferroni procedure would be helpful since it would counteract the problem of multiple...

...Exercise29
Q 1: Were the groups in this study independent or dependent? Provide a rationale for your answer.
Q 2: t ’ –3.15 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer.
Q 3: Is t ’ –1.99 significant? Provide a rationale for your answer. Discuss the meaning of this result in this
study.
Q 4: Examine the t ratios in Table VI. Which t ratio indicates the largest difference between the males and females post MI in this study? Is this t ratio signifi cant? Provide a rationale for your answer.
Q 5: Consider t ’ –2.50 and t ’ –2.54. Which t ratio has the smaller p value? Provide a rationale for your answer.
What does this result mean?
Q 6: What is a Type I error? Is there a risk of a Type I error in this study? Provide a rationale for your answer.
Q7: Should a Bonferroni procedure be conducted in this study? Provide a rationale for your answer.
Q 8: If researchers conducted 9 t-tests on their study data. What alpha level should be used to determine significant differences between the two groups in the study? Provide your calculations.
Q 9: The authors reported multiple df values in Table VI. Why were different df values reported for this study?
Q 10: What does the t value for the Physical Component Score tell you about men and women post MI? If this
result was consistent with previous research, how might you use this...

...E■ EXERCISE29 Questions to be Graded Exercise29
Name: _Amita Pradhan__________________________________________________ Class: _______________________
Date: 01/18/2013
1. Were the groups in this study independent or dependent? Provide a rationale for your answer.
The groups in this study are independent or unrelated groups that are formed by the random assignment of subjects to the treatment and comparison groups. Groups are selected from two different settings, two different points in time and are not matched in any way.
2. t –3.1 describes the difference between women and men for what variable in this study? Is this value significant? Provide a rationale for your answer.
t= -3.15 describes the difference between women and men for Mental Health variable in this study. This value is significant since the t-test yields a p value, which is .002 less than alpha .05, it can cause the null hypothesis to be rejected.
3. Is t –1.99 significant? Provide a rationale for your answer. Discuss the meaning of this result in this
study.
t –1.99 describes the difference in health functioning between women and men after a MI. It is significant on this study as the P value is 0.049 which is close and still less to the alpha 0.05 which is enough evidence to reject to the null hypothesis.
4. Examine the t ratios in Table VI. Which t ratio indicates the largest difference between the males and females...

...represents the greatest relative or standardized difference between the pretest
and 3 months outcomes? Is this t ratio statistically significant? Provide a rationale for your answer.
3. Which t ratio listed in Table 3 represents the smallest relative difference between the pretest and 3 months?
Is this t ratio statistically significant? What does this result mean?
4. What are the assumptions for conducting a t-test for dependent groups in a study? Which of these assumptions
do you think were met by this study?
5. Compare the 3 months and 6 months t ratios for the variable Exercise from Table 3. What is your
conclusion about the long-term effect of the health-promotion intervention on Exercise in this study?
Name: ___________________________________________________ Class: ______________________
Date: _________________________________________________________________________________
236 EXERCISE 31 • t-test for Dependent Groups
6. What is the smallest, significant t ratio listed in Table 2? Provide a rationale for your answer.
7. Why are the larger t ratios more likely to be statistically significant?
8. Did the health-promotion program have a statistically significant effect on Systolic blood pressure (BP) in
this study? Provide a rationale for your answer.
9. Examine the means and standard deviations for Systolic BP at pretest, 3 months (completion of the
treatment), and 6 months. What do these results indicate? Are...

...Experiential Exercises
7.2 The Pay Raise
OBJECTIVES
1. To further your understanding of salary administration.
2. To examine the many facets of performance criteria, performance criteria weighting, performance evaluation, and rewards.
INSTRUCTIONS
1. Complete the Pay Raise Worksheet.
2. In the Forum, discuss your conclusions about who received which raise and your criteria used to award the salary increases.
Pay Raise Worksheet
April Knepper is the new supervisor of an assembly team. It is time for her to make pay raise allocations for her subordinates. She has been budgeted $3,000 to allocate among her seven subordinates as pay raises. There have been some ugly grievances in other work teams over past allocations, so Knepper has been advised to base the allocations on objective criteria that can be quantified, weighted, and computed in numerical terms. After she makes her allocations, Knepper must be prepared to justify her decisions. All of the evaluative criteria available to Knepper are summarized as follows:
Supervisory Ratings
Output Absent
Employee Seniority Rating* Rate Skills Initiative Attitude Personal
David Bruce 15 yrs. 0.58 0.5% Good Poor...