Part II: Exercises 1-3 (16 pts) Use file: Homework8DataFile The memory scores fo
ID: 3063164 • Letter: P
Question
Part II:
Exercises 1-3 (16 pts)
Use file: Homework8DataFile
The memory scores for 15 fictional patients with dementia are entered in the “Homework8DataFile” SPSS document (found in the Assignment Instructions folder).
Higher memory number indicates better memory performance.
Using these data, run 3 single-sample t-tests to compare the dementia patients’ mean memory score to the following population values:
Population memory scores
Age-matched controls: m = 12.2
Patients with traumatic brain injury (TBI): m = 8.1
As demonstrated in the presentation and in the textbooks.
1 for each test involving a different population mean.
1)
Using the “explore” tab, run descriptive statistics on the dementia patients’ memory scores (make sure to include the mean and confidence interval). 2pts
Answer: SPSS output of descriptive statistics
Descriptive Statistics
N
Minimum
Maximum
Mean
Std. Deviation
dementia_memory
15
3.00
12.00
7.2667
2.71153
Valid N (listwise)
15
2A)
Population of age matched controls: m = 12.2. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 12.2
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-7.046
14
.000
-4.93333
-6.4349
-3.4317
2B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
2C)
Write a results section in current APA style describing the outcome.
All homework results sections must follow the example given in the SPSS presentation and in the textbook. Results sections are multiple sentences (a single paragraph) and must include the APA-formatted statistical statement within a sentence. 3pts
Answer
3A)
Population of patients with TBI: m = 8.1. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 8.1
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-1.190
14
.254
-.83333
-2.3349
.6683
3B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
3C)
Write a results section in current APA style describing the outcome. See (2C) for details. 3pts
Answer
Part II:
Exercises 1-3 (16 pts)
Use file: Homework8DataFile
The memory scores for 15 fictional patients with dementia are entered in the “Homework8DataFile” SPSS document (found in the Assignment Instructions folder).
Higher memory number indicates better memory performance.
Using these data, run 3 single-sample t-tests to compare the dementia patients’ mean memory score to the following population values:
Population memory scores
Age-matched controls: m = 12.2
Patients with traumatic brain injury (TBI): m = 8.1
For each test, paste the output and write a Results section in current APA styleAs demonstrated in the presentation and in the textbooks.
There will be 3 sets of output and 3 results sections using this data set1 for each test involving a different population mean.
1)
Using the “explore” tab, run descriptive statistics on the dementia patients’ memory scores (make sure to include the mean and confidence interval). 2pts
Answer: SPSS output of descriptive statistics
Descriptive Statistics
N
Minimum
Maximum
Mean
Std. Deviation
dementia_memory
15
3.00
12.00
7.2667
2.71153
Valid N (listwise)
15
2A)
Population of age matched controls: m = 12.2. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 12.2
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-7.046
14
.000
-4.93333
-6.4349
-3.4317
2B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
2C)
Write a results section in current APA style describing the outcome.
All homework results sections must follow the example given in the SPSS presentation and in the textbook. Results sections are multiple sentences (a single paragraph) and must include the APA-formatted statistical statement within a sentence. 3pts
Answer
3A)
Population of patients with TBI: m = 8.1. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 8.1
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-1.190
14
.254
-.83333
-2.3349
.6683
3B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
3C)
Write a results section in current APA style describing the outcome. See (2C) for details. 3pts
Answer
Explanation / Answer
Result:
Part II:
Exercises 1-3 (16 pts)
Use file: Homework8DataFile
The memory scores for 15 fictional patients with dementia are entered in the “Homework8DataFile” SPSS document (found in the Assignment Instructions folder).
Higher memory number indicates better memory performance.
Using these data, run 3 single-sample t-tests to compare the dementia patients’ mean memory score to the following population values:
Population memory scores
Age-matched controls: m = 12.2
Patients with traumatic brain injury (TBI): m = 8.1
For each test, paste the output and write a Results section in current APA style
As demonstrated in the presentation and in the textbooks.
There will be 3 sets of output and 3 results sections using this data set
1 for each test involving a different population mean.
1)
Using the “explore” tab, run descriptive statistics on the dementia patients’ memory scores (make sure to include the mean and confidence interval). 2pts
Answer: SPSS output of descriptive statistics
Descriptive Statistics
N
Minimum
Maximum
Mean
Std. Deviation
dementia_memory
15
3.00
12.00
7.2667
2.71153
Valid N (listwise)
15
2A)
Population of age matched controls: m = 12.2. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 12.2
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-7.046
14
.000
-4.93333
-6.4349
-3.4317
2B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
d = Mean Difference / SD = 4.93333/2.71153
= 1.81939
2C)
Write a results section in current APA style describing the outcome.
All homework results sections must follow the example given in the SPSS presentation and in the textbook. Results sections are multiple sentences (a single paragraph) and must include the APA-formatted statistical statement within a sentence. 3pts
Answer
The memory scores for 15 fictional patients with dementia ( M=7.27,SD=4.93) are significantly different than Population memory scores Age-matched controls(M = 12.2), t(14)= -7.05, p< .01, d=1.82.
3A)
Population of patients with TBI: m = 8.1. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 8.1
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-1.190
14
.254
-.83333
-2.3349
.6683
3B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
d = Mean Difference / SD = 0.83333/2.71153
= 0.30733
3C)
Write a results section in current APA style describing the outcome. See (2C) for details. 3pts
The memory scores for 15 fictional patients with dementia ( M=7.27, SD=4.93) are not significantly different than Population memory scores Patients with traumatic brain injury (TBI) (M = 8.1), t(14)= -1.19, p=.254, d=0.31.
Part II:
Exercises 1-3 (16 pts)
Use file: Homework8DataFile
The memory scores for 15 fictional patients with dementia are entered in the “Homework8DataFile” SPSS document (found in the Assignment Instructions folder).
Higher memory number indicates better memory performance.
Using these data, run 3 single-sample t-tests to compare the dementia patients’ mean memory score to the following population values:
Population memory scores
Age-matched controls: m = 12.2
Patients with traumatic brain injury (TBI): m = 8.1
For each test, paste the output and write a Results section in current APA style
As demonstrated in the presentation and in the textbooks.
There will be 3 sets of output and 3 results sections using this data set
1 for each test involving a different population mean.
1)
Using the “explore” tab, run descriptive statistics on the dementia patients’ memory scores (make sure to include the mean and confidence interval). 2pts
Answer: SPSS output of descriptive statistics
Descriptive Statistics
N
Minimum
Maximum
Mean
Std. Deviation
dementia_memory
15
3.00
12.00
7.2667
2.71153
Valid N (listwise)
15
2A)
Population of age matched controls: m = 12.2. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 12.2
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-7.046
14
.000
-4.93333
-6.4349
-3.4317
2B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
d = Mean Difference / SD = 4.93333/2.71153
= 1.81939
2C)
Write a results section in current APA style describing the outcome.
All homework results sections must follow the example given in the SPSS presentation and in the textbook. Results sections are multiple sentences (a single paragraph) and must include the APA-formatted statistical statement within a sentence. 3pts
Answer
The memory scores for 15 fictional patients with dementia ( M=7.27,SD=4.93) are significantly different than Population memory scores Age-matched controls(M = 12.2), t(14)= -7.05, p< .01, d=1.82.
3A)
Population of patients with TBI: m = 8.1. 2pts
Answer: SPSS output of the t-Test
One-Sample Test
Test Value = 8.1
t
df
Sig. (2-tailed)
Mean Difference
95% Confidence Interval of the Difference
Lower
Upper
dementia_memory
-1.190
14
.254
-.83333
-2.3349
.6683
3B)
Calculate the effect size for the one-sample t test as shown in the Green and Salkind textbook, Lesson 22.2 using the formula: d = Mean Difference / SD. Show all work. 2pts
Answer
Work
d = Mean Difference / SD = 0.83333/2.71153
= 0.30733
3C)
Write a results section in current APA style describing the outcome. See (2C) for details. 3pts