Question

1) The following data for subcutaneous oxygen tension (PSCO2, measured in mmHg) 12 hours after the start of two protocols, administered to the same 10 healthy subjects in random order- a bed rest protocol and a high activity protocol. Please choose the statistical test that is most appropriate for this research.

a) Repeated Measures t-test

b) Independent Samples t-test

c) Pearson r Correlation Coefficient

d) One Sample z-test

2) A researcher is testing the effect of a new cold and flu medication on mental alertness. A sample of eleven college students is obtained and each student is given the normal dose of the medicine. Thirty minutes later, each student’s performance is measured on a video game that requires careful attention and quick decision making. Performance on this video game has been evaluated in previous years and shown an average performance of 15. The scores for the eleven students show a mean of 12 and a standard deviation of 2. Please choose the statistical test that is most appropriate for this research.

a) One Sample t-test

b) One Sample z-test

c) One-way ANOVA

d) Independent Samples t-test

3) A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, can affect mental alertness. A sample of eleven college students is obtained and each student’s performance on a familiar video game is measured before and after eating a traditional Thanksgiving dinner including roast turkey. The average difference score between the two sessions was 14 points less after the meal. Please choose the statistical test that is most appropriate for this research.

a) One Sample t-test

b) Repeated Measures t-test

c) Two-way ANOVA

d) Independent Samples t-test

Answer 1

Solution-1:

administered to the same 10 healthy subjects

rest protocol and a high activity protocol.

sample size are less than 30

b) Independent Samples t-test

Solution-2:

The scores for the eleven students show a mean of 12 and a standard deviation of 2.

perform t test for single mean

t=xbar-mu/s/sqrt(n)

a) One Sample t-test

Solution-3:

before and after eating a traditional thanksgiving dinner including roast turkey.

same sample paired t test

n<30

b) Repeated Measures t-test