Question

1. Kraft Foods is testing a new breakfast cereal which was found to be tastier than the competitor after a three week in home trial. The experimental group was given the new cereal, the control group was given the competitor's cereal. Later it was learned that numerous people dropped out of the study for the reason that they didn't like the new cereal. Which of the following pressures to internal validity is most likely

a. History
b. Maturation
c. Mortality
d. Sampling bias
e. Instrumentation

2. A researcher states the subsequent hypothesis Students who skip more classes have higher likelihood of failing their classes. This is what type of hypothesis?

a. Negative Directional hypothesis
b. Non-Directional hypothesis
c. Positive Directional hypothesis
d. Null hypothesis

3. Which one of the following is an instance of an interval scale?

a. When your vehicle requires maintenance service or you have problems, how often do you take it to your primary automobile service provider? (Check the one appropriate response) Never 1 2 3 4 5 6 Every Time

b. When your vehicle needs maintenance service or you have problems, do you habitually take it to your primary automobile service provider? (Check the one suitable response)
__ Yes __ No

c. Since purchasing your automobile, roughly how often do you use the services at your primary automobile service provider? (Check the one suitable response) __ Less than 3 times __ 9 to 12 times __ Over 16 times __ 4 to 8 times __ 13 to 16 times

d. In the past twelve months how many times did you take your vehicle for service or repairs to your primary automobile service provider? (Write the # of times on the lines provided) ____ # of times

e. Both answer 1 as well as 3

4. A researcher is interested in discovery out whether consumers perceive curly fries as healthier than crinkle cut fries. She randomly assigns 100 people to sample curly fries as well as another 100 people to sample crinkle cut fries. Everybody rates the healthiness of the fry they sample. What type of test does the researcher require to do to compare the mean healthiness ratings for the two types of fries?

a. Paired sample t-test

b. ANOVA

c. Independent Samples t-test

d. Chi-square/Crosstabs

e. One Sample t-test

5. McDonald's is considering introducing curly fries. They want to know if the curly fries would be evaluated more favorably than their traditional shoestring fries. They give a random sample of of 100 customers the curly fries and compare the mean evaluation with the historical average for the traditional shoestring fries. What is the appropriate test to compare the evaluations?

Answer

a. Crosstabs/Chi Square

b. One sample t-test

c. ANOVA

d. Independent samples t-test

e. Paired samples t-test