SPSS Hands-on Data Entry, Descriptive & Inferential Statistics Assignment

QUESTION 1

 Dr. Syaiba and Madam Nor Fadzillah are responsible for preparing the final exam papers for the statistics course. However, many students complained that it was difficult to score an “A” for Dr. Syaiba’s exam paper. Test the difficulties of Dr. Syaiba’s exam paper using a test value of 80  marks for the minimum score of obtaining “A”. Refer to Excel

{spssdata.xls} for {one sample mean} and answer the following questions:

1. Enter the data in Rename variable using single word.
2. Write the null and alternative hypotheses to test the difficulties of Syaiba’s exam paper.
3. Obtain a descriptive
4. Plot Does the data have an outlier?
5. Perform the test for Does the normality assumption meet?
6. Perform hypothesis testing using alpha = 05.
7. Report on t-statistic and t-critical
8. Make decision using p-value. Interpret the result

 QUESTION 2

 UNIMY Exam Unit wants to use two statistics exam papers by Dr. Syaiba and Madam Nor Fadzillah for the final exam of Polytechnic Mauritius franchise diploma program. The Exam Unit wants to know if the exam paper is equally difficult. If the mean difference between scores for students is “close enough” to zero, Exam Unit will make a practical conclusion that the exam papers are equally difficult. Refer to file {spssdata.xls} for {two sample mean} and answer the following questions: 

1. Enter the data in Rename MF for Madam Fadzillah and DS for Dr. Syaiba.
2. Recode MF to 0 and DS to 1
3. Write the null and alternative hypotheses to test the difficulties of both exam papers
4. Obtain a descriptive Explain the distributions between two exam scores (in terms of center, variation, shape).
5. Plot side-by-side Does the data have outliers?
6. Perform the test for Does the normality assumption is meet?
7. Perform the test for equality Does the equal variance assumption is meet?
8. Perform hypothesis testing using alpha = 05.
9. Report on t-statistic and t-critical
10. Make decision using p-value. Interpret the

QUESTION 3 

UNIMY Academic Affairs want to know whether the new teaching module has significantly impacted student performance on a particular exam. To test this, 20 students participated in a pre-test in the study program for three weeks using the new module. Then, the students retake a test of similar difficulty. Refer to file {spssdata.xls} for {paired sample mean} and answer the following questions:

1. Enter the data in Rename every variable using single word.
2. Compute new variable {Diff} from post scores - pre scores
3. Write the null and alternative hypotheses to test the difference between two scores
4. Obtain a descriptive table
5. Plot Does the data have outliers?
6. Perform the test for Does the normality assumption is meet?
7. Perform hypothesis testing using alpha = 05.
8. Report on t-statistic and t-critical
9. Make decision using p-value. Interpret the

QUESTION 4 

A clinical trial is run to compare weight loss programs and participants are randomly assigned to one of the comparison programs and are counseled on the details of the assigned program. Participants follow the assigned program for 8 weeks. The outcome of interest is weight loss, defined as the difference in weight measured at the start of the study (baseline) and weight measured at the end of the study (8 weeks), measured in pounds. Three popular weight loss programs are considered. The first is a low-calorie diet. The second is a low-fat diet and the third is a low-carbohydrate diet. For comparison purposes, a fourth group is considered as a control group. Participants in the fourth group are told that they are participating in a study on healthy

Table 1: Weight Losses for Four Diet Plans

1. Enter the data in Rename every variable using single word.
2. Write the null and alternative hypothesis
3. Perform the test for Does the normality assumption is meet?
4. Perform the test for equality Does the equal variance assumption is meet?
5. Test if there a statistically significant difference in the mean weight loss among the four diets using alpha = 05.
6. Report on F-statistic and F-critical
7. Make decision using p-value. Interpret the
8. If there is a significance difference existed for diet plans, proceed with post Identify which diet plan is different.

 QUESTION 5

 The Titanic data contains data on 1309 passengers and crew who were on board the ship ‘Titanic’ when it sank in 1912. The question of interest is which factors affected survival. The dependent variable is ‘Survival’ and possible independent values are all the other variables. 

1. Enter the data in Rename every variable using single word
2. Select Data and Weight Cases {Frequency}
3. Write the null and alternative hypothesis
4. Perform Chi-square test to determine whether there is an association between nationality class and
5. Report on Chi-square-statistic and Chi-square-critical
6. Make decision using p-value. Interpret the

Table 2: Titanic Data

QUESTION 6

 Refer to file {spssdata.xls} for {linear regression} and answer the following questions:

1. Enter the data in Rename every variable using single word.
2. Use {yield} as ???? and {Temperature} for ????. Run the Obtain the ????²(by model fit) and parameter coefficient estimates .Write the fitted model..
3. Run the assumptions
   1. Linearity Y and X using Scatter Plot Y X. Does the linearity exist?
   2. Independence of errors using Scatter Plot ID Unstd. Residual. Does the error independency assumption is meet?
   3. Normality of errors using Residual. Does the error normality assumption is meet?
   4. Constant variance using Scatter Plot Predicted vs. Unstd Residual. Does the constant variance assumption is meet?
   5. Compute the correlation for 'Y' and 'X'. Explain the output