Each of the following questions are somewhat similar and pertain to the material
ID: 3294470 • Letter: E
Question
Each of the following questions are somewhat similar and pertain to the material covered earlier. Answer each.
A) Your study examines the difference in math scores of students from three different age groups. Fifteen 12th grade students, 15 9th grade students and 15 8th grade students were randomly selected from a high school and all 45 students took the PIAT Math test. The test is an interval level measure with a mean of 100 and standard deviation of 10 in the population. What type of statistical analysis would you perform in order to answer the research question?
Analysis of variance (ANOVA).
t-test for dependent groups
chi square
t-test for independent groups
Correlations
B) A randomized study compared the average sperm count in three age groups of men at six weeks after a vascectomy. The groups were men from 25 to 35, 35 to 45 and 55 to 65 years of age. Sperm count is a ratio level measure, it has values anywhere between zero and over 25 million per milliliter. What would be the most appropriate test for this analysis?
ANOVA
Independent t-test
chi-square
Spearman correlation coefficient
dependent samples t-test
Pearson correlation
C) A researcher investigates a new drug that is supposed to reduce pain. She administers a placebo (no drug) to 100 patients. After 2 hours, the pain level of the patients is measured. One day later, the same patients were given a new drug, and after two hours, their pain level was measured again. The measure of pain was an interval level measure. The patients experienced significantly more pain after taking the placebo pill. Which of the following statistical procedures would be used to test the research question that the new drug reduces pain signifcantly better than a placebo.
repeated measures t-test
independent t-test
t-test for dependent groups
repeated measures ANOVA
correlations
D) You conduct a study in order to determine whether the amount of sleep someone gets is related to their mood. The amount of sleep is measured by the number of minutes subjects slept the night before their mood was measured. Mood was measured by a scale that was developed by a famous mood specialist and it is an interval level scale. Which of the following statistical procedures would you use to test the relationship between these two interval level measures?
chi-square
independent t-test
t-test for dependent groups
Pearson correlation
repeated measures ANOVA
a.Analysis of variance (ANOVA).
b.t-test for dependent groups
c.chi square
d.t-test for independent groups
e.Correlations
Explanation / Answer
A) Correct Answer: Option (A)
since test whether 3 different age groups
B) Correct Answer: Option (A)
c) Correct answer: Option (C)
d) Correct Answer: Option (A)
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