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STA1610 Assignment 5 Solutions 2023
- Institution
- University Of South Africa (Unisa)
STA1610 Assignment 5 Solutions 2023. This contains the expected questions with their solutions
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STA 1610ASSIGNMENT
5 2023
, Started on -
State Finished
Completed on -
Time taken 1 hour 4 mins
Marks 20.00/20.00
Grade 100.00 out of 100.00
Please Note: I have completed the attempt two times. Sometimes the questions are
slightly different with each attempt. These are marked with the question number and FIRST
CHOICE or SECOND CHOICE text. Please read your question carefully so you know
whether the first choice or second choice attempt applies to you. Good Luck!
Question 1
Correct
Mark 2.00 out of 2.00
Question 1 FIRST Choice text
Which one of the following statements is incorrect about a chi-square test of independence
between two variables?
a.
The alternative hypothesis is that the two variables are independent of each other.
b.
The expected frequency for each cell is equal to (row total × column total) ÷÷ n , where n is
the sample size.
c.
The test statistic has (r-1)(c-1) degrees of freedom, where r is the number of rows and c is
the number of columns.
d.
The two variables are categorical.
e.
If the observed and the expected frequency for each cell are equal, then the test statistic will
be equal to zero.
ANSWER = A
Question 2
Correct
Mark 2.00 out of 2.00
Question 2 FIRST Choice text
Now consider a contingency table with 5 rows and 2 columns (in a chi-square test of
independence). If the level of significance is 1%, what is the critical value?
a.
13.277
b.
18.307
c.
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