MGSC 291 Optional Final Exam
questions with complete solutions
The P-value of a hypothesis test is the probability of seeing a test statistic that extreme or more - correct
answer ✔✔in the direction of the alternative hypothesis if the null is true
The Type II error rate of a statistical hypothesis test should be - correct answer ✔✔small
The interpretation of a hypothesis test result is about the - correct answer ✔✔parameter
The Type I error rate of a statistical test is - correct answer ✔✔P[reject HO|HO is true]
Power - correct answer ✔✔P[reject HO|HO is false]
A good strategy for increasing power is to - correct answer ✔✔increase the sample size
Type II error rate - correct answer ✔✔P[fail to reject HO| HO is false]
Using the same data set to construct a confidence interval, a 99% interval will be - correct answer
✔✔wider than a 95% interval
Increasing the sample size will make a confidence interval - correct answer ✔✔narrower
Why do we want experiments to be replicated when carrying out a Two-Way ANOVA? - correct answer
✔✔So that we can test for the interaction
You want to study whether the percent of shoppers who use credit cards for groceries is less than 25%.
Identify the correct null and alternative hypothesis - correct answer ✔✔HO: p=0.25, HA: p<0.25
questions with complete solutions
The P-value of a hypothesis test is the probability of seeing a test statistic that extreme or more - correct
answer ✔✔in the direction of the alternative hypothesis if the null is true
The Type II error rate of a statistical hypothesis test should be - correct answer ✔✔small
The interpretation of a hypothesis test result is about the - correct answer ✔✔parameter
The Type I error rate of a statistical test is - correct answer ✔✔P[reject HO|HO is true]
Power - correct answer ✔✔P[reject HO|HO is false]
A good strategy for increasing power is to - correct answer ✔✔increase the sample size
Type II error rate - correct answer ✔✔P[fail to reject HO| HO is false]
Using the same data set to construct a confidence interval, a 99% interval will be - correct answer
✔✔wider than a 95% interval
Increasing the sample size will make a confidence interval - correct answer ✔✔narrower
Why do we want experiments to be replicated when carrying out a Two-Way ANOVA? - correct answer
✔✔So that we can test for the interaction
You want to study whether the percent of shoppers who use credit cards for groceries is less than 25%.
Identify the correct null and alternative hypothesis - correct answer ✔✔HO: p=0.25, HA: p<0.25
