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Questions and Answers
In the first scenario, what is the null hypothesis (H0) for the test?
In the first scenario, what is the null hypothesis (H0) for the test?
- χ̅ ≤ 50
- µ > 50
- µ = 50 (correct)
- χ̅ = 50
What is the decision rule for rejecting the null hypothesis in the first scenario?
What is the decision rule for rejecting the null hypothesis in the first scenario?
- Reject H0 if Z ≥ 1.96
- Reject H0 if Z ≥ 1.64 (correct)
- Reject H0 if Z ≤ 1.64
- Reject H0 if Z ≤ 1.96
In the second scenario, what is the alternative hypothesis (H1) for the test?
In the second scenario, what is the alternative hypothesis (H1) for the test?
- p > 0.75 (correct)
- p ≤ 0.75
- p = 0.75
- p < 0.75
What is the sample proportion (p) in the second scenario?
What is the sample proportion (p) in the second scenario?
What is the calculated Z value in the second scenario?
What is the calculated Z value in the second scenario?
What does rejecting the null hypothesis at alpha = 0.05 indicate in both scenarios?
What does rejecting the null hypothesis at alpha = 0.05 indicate in both scenarios?
In a hypothesis test H0: p=0.55 versus H1: p< 0.55 where p is a population proportion, what is the value of the test statistics closest to?
In a hypothesis test H0: p=0.55 versus H1: p< 0.55 where p is a population proportion, what is the value of the test statistics closest to?
The distribution is negatively skewed if the arithmetic mean is:
The distribution is negatively skewed if the arithmetic mean is:
What type of graphical presentation is most common for discrete data?
What type of graphical presentation is most common for discrete data?
What measure of central tendency cannot be used with skewed data?
What measure of central tendency cannot be used with skewed data?
The value set for α is known as:
The value set for α is known as:
Which hypothesis is the analyst trying to prove in a hypothesis test?
Which hypothesis is the analyst trying to prove in a hypothesis test?
What type of t-test will be used to compare the number of hours of sleep after taking a placebo and after taking a pill claiming to be better than a placebo for 50 patients?
What type of t-test will be used to compare the number of hours of sleep after taking a placebo and after taking a pill claiming to be better than a placebo for 50 patients?
If a calculated t value is less than the tabulated t value, what decision would be made in the hypothesis test?
If a calculated t value is less than the tabulated t value, what decision would be made in the hypothesis test?
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