Exam (elaborations)
Exam 3-ISDS 2001 questions well answered to pass
- Course
- Institution
Exam 3-ISDS 2001 questions well answered to pass
[Show more]
Content preview
Exam 3-ISDS 2001If the null hypothesis is rejected by the goodness-of-fit test, the alternative hypothesis specifies which of
the population proportions differ from their hypothesized values - correct answer ✔✔FALSE
For a chi-square test of a contingency table, the expected frequencies for each cell are calculated
assuming the two events are independent of one another. - correct answer ✔✔TRUE
For a chi-square test of a contingency table, each expected frequency must be at least 3. - correct
answer ✔✔FALSE
A goodness-of-fit test analyzes for two qualitative variables whereas a chi-square test of a contingency
table is for a single qualitative variable. - correct answer ✔✔FALSE
For the Jarque-Bera test for normality, the test statistic is assumed to have a chi-square distribution with
two degrees of freedom. - correct answer ✔✔TRUE
For the goodness-of-fit test, the expected category frequencies are found using the ________.
A) sample proportions
B) proportions specified under the null hypothesis
C) average of the hypothesized and sample proportions
D) proportions specified under the alternative hypothesis - correct answer ✔✔proportions specified
under the null hypothesis
Which of the following null hypotheses is used to test if five population proportions are the same?
A) H0: p1 = p2 = p3 = p4 = p5 = 0.25
B) H0: p1 = p2 = p3 = p4 = 0.25
C) H0: p1 = p2 = p3 = p4 = 0.20
D) H0: p1 = p2 = p3 = p4 = p5 = 0.20 - correct answer ✔✔H0: p1 = p2 = p3 = p4 = p5 = 0.20
, For the goodness-of-fit test, the sum of the expected frequencies must equal _____
A) 1
B) n
C) k
D) k−1 - correct answer ✔✔n
The chi-square test of a contingency table is a test of independence for ________.
A) a single qualitative variable
B) two qualitative variables
C) two quantitative variables
D) three or more quantitative variables - correct answer ✔✔a single qualitative variable
For the chi-square test of a contingency table, the expected cell frequencies are found as ________.
A) the row total multiplied by the column total divided by the sample size
B) the observed cell frequency
C) (r−1)(c−1)
D) rc - correct answer ✔✔the row total multiplied by the column total divided by the sample size
The chi-square test of a contingency table is valid when the expected cell frequencies are ________.
A) equal to 0
B) more than 0 but less than 5
C) at least 5
D) negative - correct answer ✔✔at least 5
For the chi-square test of a contingency table, the expected cell frequencies are found as eij = (row i
total)/(column j total)/(sample size) which is the same as ________.
A) the observed cell frequencies
B) the cell probability multiplied by the sample size
C) the row total
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 kirus27. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
83750 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now