Suppose you want to test if Group A and Group B perform differently on a test. Y
ID: 3352290 • Letter: S
Question
Suppose you want to test if Group A and Group B perform differently on a test. Your null hypothesis is that there is no difference in mean test score between Group A and Group B. What is your alternative hypothesis?
The effect that the result of the study will have on the area of applied psychology
The probability of rejecting the null hypothesis if in fact the null hypothesis is true
Having a large enough effect size in order to always get a significant result
The probability that the study will yield a significant result if the research hypothesis is true
How many subjects fall below the mean of a normal distribution?
40%
50%
60%
10%
2 points
QUESTION 7
What can be concluded if the null hypothesis is rejected?
The research hypothesis is supported
The research hypothesis is true and the null hypothesis is false
The null hypothesis is true and the research hypothesis is false
The null hypothesis should have been based on a directional hypothesis
2 points
QUESTION 8
What is the first step in the five steps of hypothesis testing
Restate the question as a research hypothesis and a null hypothesis about the populations
Determine the characteristics of the comparison distribution
Determine the cutoff of the comparison distribution at which the null hypothesis should be rejected
Decide whether your power is sufficient to reject the null hypothesis
1/6
1/3
Not enough information.
1/2
Statistical power is defined as
The mean test score for Group A is greater than the mean test score for Group B.
The mean test score for Group A is smaller than the mean mean test score for Group B.
The mean test score for Group A is different than the mean test score for Group B.
Not enough information.
Suppose you roll a six-sided die one time. What is the probability that you roll either a 1 or a 2?
The effect that the result of the study will have on the area of applied psychology
The probability of rejecting the null hypothesis if in fact the null hypothesis is true
Having a large enough effect size in order to always get a significant result
The probability that the study will yield a significant result if the research hypothesis is true
How many subjects fall below the mean of a normal distribution?
40%
50%
60%
10%
2 points
QUESTION 7
What can be concluded if the null hypothesis is rejected?
The research hypothesis is supported
The research hypothesis is true and the null hypothesis is false
The null hypothesis is true and the research hypothesis is false
The null hypothesis should have been based on a directional hypothesis
2 points
QUESTION 8
What is the first step in the five steps of hypothesis testing
Restate the question as a research hypothesis and a null hypothesis about the populations
Determine the characteristics of the comparison distribution
Determine the cutoff of the comparison distribution at which the null hypothesis should be rejected
Decide whether your power is sufficient to reject the null hypothesis
Explanation / Answer
Solution:-
5) The mean test score for Group A is different than the mean test score for Group B.
6) The subjects fall below the mean of a normal distribution is 50%.
7) The research hypothesis is true and the null hypothesis is false.
8) Restate the question as a research hypothesis and a null hypothesis about the populations.
9) The probability that you roll either a 1 or a 2 is 1/2.
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