PORTAGE LEARNING STATISTICS MODULE 4 Z
TEST 2026 QUESTIONS SOLUTIONS GRADED
A+
◉ You want to know if a new employee incentive program really
works. How would you test the hypothesis that it does work?
Answer: Try to disprove the hypothesis that it does not work
◉ Suppose you conduct a study in which you set the significance
level cutoff at a lenient probability level, such as 15%. In this case,
you would have a 15% chance of making a: Answer: Type I error
◉ A researcher tests whether a new teaching method is more
effective than the old one. What is the RESEARCH hypothesis?
Answer: The new teaching method is more effective than the old
teaching method.
◉ Place the five steps of the hypothesis-testing process in the
correct order:
1.Determine the characteristics of the comparison distribution.
2.Decide whether to reject the null hypothesis.
3.Restate the question as a research hypothesis and a null
hypothesis about the populations.
, 4.Determine your sample's score on the comparison distribution.
5.Determine the cutoff sample score on the comparison distribution
at which the null hypothesis should be rejected. Answer: 3, 1, 5, 4, 2
◉ A researcher wants to know if a new type of health insurance
works better or worse than a standard form of health insurance. The
hypothesis that there will be no difference between the new type of
insurance and the old type of insurance is called the: Answer: null
hypothesis
◉ If the null hypothesis is rejected, the researcher can conclude that
the results: Answer: support the research hypothesis OR prove that
the research hypothesis is true (unconfirmed which is correct yet)
◉ What is a correct argument for using a two-tailed test even if
there is a clear basis for predicting a result in a given direction?
Answer: If an unexpected result comes out opposite to what is
predicted, it does not have to be ignored.
◉ The fact that probabilities are proportions means that they:
Answer: can't be lower than zero or more than one
◉ A particular nation has a human rights score of 41, which equals a
Z score of 1.3. What is the percentage of nations above this score?
(Assume a normal distribution.) Answer: 50% - 40.32% = 9.68%
TEST 2026 QUESTIONS SOLUTIONS GRADED
A+
◉ You want to know if a new employee incentive program really
works. How would you test the hypothesis that it does work?
Answer: Try to disprove the hypothesis that it does not work
◉ Suppose you conduct a study in which you set the significance
level cutoff at a lenient probability level, such as 15%. In this case,
you would have a 15% chance of making a: Answer: Type I error
◉ A researcher tests whether a new teaching method is more
effective than the old one. What is the RESEARCH hypothesis?
Answer: The new teaching method is more effective than the old
teaching method.
◉ Place the five steps of the hypothesis-testing process in the
correct order:
1.Determine the characteristics of the comparison distribution.
2.Decide whether to reject the null hypothesis.
3.Restate the question as a research hypothesis and a null
hypothesis about the populations.
, 4.Determine your sample's score on the comparison distribution.
5.Determine the cutoff sample score on the comparison distribution
at which the null hypothesis should be rejected. Answer: 3, 1, 5, 4, 2
◉ A researcher wants to know if a new type of health insurance
works better or worse than a standard form of health insurance. The
hypothesis that there will be no difference between the new type of
insurance and the old type of insurance is called the: Answer: null
hypothesis
◉ If the null hypothesis is rejected, the researcher can conclude that
the results: Answer: support the research hypothesis OR prove that
the research hypothesis is true (unconfirmed which is correct yet)
◉ What is a correct argument for using a two-tailed test even if
there is a clear basis for predicting a result in a given direction?
Answer: If an unexpected result comes out opposite to what is
predicted, it does not have to be ignored.
◉ The fact that probabilities are proportions means that they:
Answer: can't be lower than zero or more than one
◉ A particular nation has a human rights score of 41, which equals a
Z score of 1.3. What is the percentage of nations above this score?
(Assume a normal distribution.) Answer: 50% - 40.32% = 9.68%
