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1. Question:
In a study investigating the relationship between hours of
study and exam scores, a sample of 100 students was
selected. The mean score in the sample was 75, and the
standard deviation was 5. The population standard
deviation is unknown. What statistical test is appropriate to
determine if there is a significant relationship between
hours of study and exam scores?
a) Paired t-test
b) Chi-square test
c) One-sample t-test
d) Independent t-test
Answer:
c) One-sample t-test
Rationale:
The one-sample t-test is used to determine whether the
mean of a single sample differs significantly from a known
or hypothesized population mean. In this case, the
researcher wants to test if the average exam score (75)
differs significantly from the population mean.
2. Question:
A researcher is interested in investigating whether there is a
significant difference in exam scores between two differentÂ
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