Create an SPSS data file from the provided Excel data set by importing the data into SPSS. Paste a screen shot of the variable view of the data file to show the following:
Q1. Data Preparation: (2 points total)
Create an SPSS data file from the provided Excel data set by importing the data into SPSS. Paste a screen shot of the variable view of the data file to show the following:
– All variables are present in the “Data View”
– Each variable is correctly configured in “Measure” under the “Variable View”
– All nominal/ordinal variables have the “Values” specified.
(2 points total: Deduct .5 for each missing/incorrect element up to 2 points total)
Q1. Manually Perform and Interpret a one-sample t Test (13 points total)
The average MMSE score is around 27 in the general population aged 75 and up. The participants in this project have no neurological disorders and are well-educated so the researchers hypothesized that the individuals aged 75 or older in their research population would score significantly higher than the general population in the same age range. So the research question here is:
Do people aged 75 or older in the research population (population 1) have significantly higher MMSE sores compared to those aged 75 or older in the general population (population 2)?
Select the participants who are 75 or older from the data set, and then enter their scores on MMSE into a separate Excel worksheet for this question set. There should be 10 data points. Follow the steps below to conduct a one-sample t test MANUALLY, with a = .05.
Hint: We know that the mean MMSE score for population 2 (that is, the comparison population) is µ2 = 27.
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Create directional alternative hypothesis and null hypothesis from the research question listed above. Type the hypotheses out both in words and in symbol notations.
(2 points total: 1 for each hypothesis. If symbol notation or written format is missing or incorrect for a hypothesis, deduct .5)
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For the one-tailed hypothesis test with α = .05:
What is the degree of freedom? (1 point, must show manual calculation process to earn the point)
Identify the critical t value from the t table. (1 point, must explain how the value is obtained to earn the point)
Be sure to explain how you figure out each of the answers. No point is earned if there is no explanation or calculation process.
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Calculate the t statistic by following the steps below.
3a. Calculate the sample mean, M.
(1 point, must show manual calculation process to earn the point)
3b. Calculate the estimated population standard deviation s.
(1 point, must show manual calculation process to earn the point)
3c. Calculate the standard error of the comparison distribution, sM.
(1 point, must show manual calculation process to earn the point)
3d. Calculate the t statistic using the results from 3a, 3b, and 3c.
(1 point, must show manual calculation process to earn the point)
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Compare the t statistic with the critical t value to make a decision on the hypothesis test.
-Is the t statistic more extreme than the critical t value?
-Do you reject (or fail to reject) the null hypothesis?
(2 points total: 1 for each question)
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Answer the research question based on the hypothesis test result.
(1 point)
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Calculate the raw effect size and standardized effect size of this hypothesis test.
(2 points total: 1 for each effect size, must show manual calculation process to earn the point)
Q2. Use SPSS to Perform and Interpret a one-sample t Test (10 points total)
Use the whole data set (50 participants) for this question set.
For examining cognitive functions of older adults, there is a national norm on a cognitive test that has been obtained from a sample with an average age of 70. The researchers would like to compare their participants against that national norm, but they need to know if their the average age in their research population is significantly different from the national norm population or not. If so, the national norm would not be an appropriate norm for this research project. So the research question here is:
Do the research population (population 1) and the national norm population (population 2) differ significantly in average age?
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