Business Statistics
Instructor : Dr. Faisal Awartani
At one point of time, longtime ago 
, I worked on designing an evaluation for a school health program that worked on improving nutritional health among school children in Ramallah governorate. For project evaluation purposes, I designed and implemented two surveys to assess students knowledge, attitudes an practices (KAP) towards healthy foods.
The attached survey data represents the results of two surveys conducted on school students (3rd, 7th and 10th grades) over two rounds (pre-intervention round and post-intervention round). The intervention was a project implemented by school health institute within the ministry of education to improve nutritional health among school kids. As a result, a Knowledge, Attitude and Practice (KAP) study was conducted on a sample of school children. The first round was conducted among school kids before the project started and this round is called baseline survey (pre-intervention). Another round of the survey was conducted post-intervention on another sample of kids within the same grades. The project targeted school students in Jerusalem governorate. A large scale campaign was implemented among school kids within Ramallah governorate schools for almost a year after the baseline survey was conducted. Some of the project activities were training workshops to teachers on nutritional health, student’s activities to educate them about nutritional health among other information dissemination activities.
In this data set we asked the following knowledge questions:
Do you believe that the following foods are rich in “iron”?
|
q4.1 |
Spinach / Lettuce |
|
q4.2 |
Carrots / Apples |
|
q4.3 |
Tea |
|
q4.4 |
Milk products : Milk , Yogurt , Dairy , Cheese |
|
q4.5 |
Broad bean ( check peas) / Pea bean |
|
q4.6 |
Liver |
|
q4.7 |
Eggs |
|
q4.8 |
Soft drinks ( Cola , Soda , Seven up ) |
|
q4.9 |
Fresh juice |
|
q4.10 |
Nuts : almonds , hazelnuts ,Walnut , Pistachio |
|
q4.11 |
Chips |
|
q4.12 |
Biscuits |
|
q4.13 |
Fish / Sardine |
|
q4.14 |
Coffee / Cocoa |
In the same data set you will find another variable called “Case Source”, which has two options “1. Pre-Intervention, 2. Post-Intervention”.
Q1-
Use the above data to test the following claims.
Claim # 1: The project was successful in shifting students knowledge score towards nutritional foods.
Claim # 2: The project was successful in shifting students attitudes score towards nutritional foods.
Claim # 3: The project was successful in shifting students practice score towards nutritional foods.
Claim # 4: The knowledge score of female students is higher than that of male students before project
intervention.
Claim #4: The variances in the students knowledge before intervention is different than that of the
students knowledge after interventions.
Claim # 5: The knowledge on q4.10 is related to gender before intervention.
Claim # 6: The knowledge score is related to gender before intervention.
For each claim:
a- Define the dependent and independent variables and their types.
b- State the null and alternative hypothesis
c- Make your decision using the proper test of hypothesis.
Q2- Can we conclude that overall knowledge improved among males more than that among females after project intervention. Explain.
Q3- Can we conclude that over all knowledge improved among 3rd graders more than that among 9th graders after project intervention. Explain.
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