The P-Value of a hypothesis test is the probability of seeing a test statistic this extreme or more - Correct Ans-In the direction of the alternative hypothesis if the null is true
The interpretation of a hypothesis test result is about the - Correct Ans-Parameter
Type 1 Error Rate - Correct ...
Mgsc 291 Exam Study Guide Questions
and Answers Graded A 2024-2025
The P-Value of a hypothesis test is the probability of seeing a test statistic this extreme
or more - Correct Ans-In the direction of the alternative hypothesis if the null is true
The interpretation of a hypothesis test result is about the - Correct Ans-Parameter
Type 1 Error Rate - Correct Ans-Probability of rejecting the null when the null is true
Power - Correct Ans-Probability of rejecting the null when the null is false
Type 2 error rate - Correct Ans-Probability of failing to reject the null when the null is
false.
Using the same data set to construct a confidence interval, a 99% interval will be -
Correct Ans-Wider than a 95% interval
Increasing the sample size will make a confidence interval - Correct Ans-narrower
A good strategy for increasing power is to - Correct Ans-Increase the sample size
Suppose you conduct a statistical hypothesis test and it results in a P-Value of 0.10 with
an alpha of 0.05. You should - Correct Ans-Fail to reject the HO(do not find for HA)
Suppose we have conducted a hypothesis test and conclude to no reject HO. Which
one of the following statements is correct? - Correct Ans-A type 2 error may have been
made
Your 95% confidence interval for u1-U2 is (3,5). For the test of HO: U1-U2=0 against
U1-U2=/0 at an alpha of 0.05 you would - Correct Ans-Reject the null hypothesis (HO)
Your 95% confidence interval for U1-U2 is (3,5). What is the correct interpretation of the
confidence interval? - Correct Ans-We are 95% confident that mean 1 is bigget by 3 to
5.
The Darla Moore career center wants to study whether mean salary is different for male
and female graduates of the business school. Identify the correct null and alternative
hypothesis. - Correct Ans-HO: uM-uF=0, HA uM-Uf=/0
You want to study whether the percent of students who go on to have successful
careers is higher than 75%. Identify the correct null and alternative hypothesis. - Correct
Ans-HO:p=0.75, HA:p>0.75
, You study whether the percent of students who go on to have successful careers is
higher than 75%. Your P-value for the hypothesis test is 0.0005. You should conclude: -
Correct Ans-There is strong evidence the percent of students who are successful is
higher than 75%
You study whether the percent of student who go on to have successful careers is
higher than 75%. Your P-value for the hypothesis test is 0.15. You should conclude: -
Correct Ans-There is little to no evidence the percent of students who are successful is
higher than 75%
You conduct a test to see whether the percent of students who go on to have successful
careers is higher than 75%. Your test statistics is 2.9. Which area should you shade to
find the P-value for the test? - Correct Ans-B (because you shade the area to the right
b/c it is greater than)
In design of experiments, when you have k-factors, each with 2 levels you have a -
Correct Ans-2k factorial design
In regression and ANOVA, you can check which assumption(s) with a residuals versus
predicted plot? - Correct Ans-Errors have mean 0 & Errors have equal variance
In regression and ANOVA, you can check which assumption(s) with a QQ plot of the
residuals? - Correct Ans-Errors are normally distributed
The plot below shows and extreme point at (28,61). This point likely - Correct Ans-Has
high leverage
The correlations in these plots are -0.71, -0.06, 0.72,-0.90. Which plot has a correlation
of 0.72? - Correct Ans-Plot A (goes to the right, cause positive slope)
Which region had the highest average case price? - Correct Ans-Keuka
(Look at differences)
What are the degrees of freedom for location? - Correct Ans-2(3-1)
How is the F statistic calculated? - Correct Ans-(Mean sq/residual mean sq)
How to find mean sq? - Correct Ans-Sum sq/df
What is the null hypothesis for this anova - Correct Ans-Mean case price is the same for
all 3 regions
For a significant P-Value on a one-way ANOVA, what should you do next? - Correct
Ans-Run Tukey's HSD
The experiment was replicated __ times? - Correct Ans-three times
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Bestzone. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.
