Quiz 4 F2017 (Covers Chapters 7, 8) - November 9th, 2017 at 16:00 for 24 Hours.pdf

29/1/18 11:38 am Quiz 4 F2017 (Covers Chapters 7, 8) - November 9th, 2017 at 16:00 for 24 Hours
Page 1 of 8
Home ▶ Courses ▶ John Molson School of Business ▶ Commerce ▶ COMM-215-2172-D ▶
Week 7 October 18 ▶
Quiz 4 F2017 (Covers Chapters 7, 8) - November 9th, 2017 at 16:00 for 24 Hours
Question
The spread of the sampling distribution of xbar is ________ the spread of the
corresponding population distribution sampling distribution.
1
Correct
Mark 1.00 out of
1.00
Started on Thursday, 9 November 2017, 5:56 PM
State Finished
Completed on Thursday, 9 November 2017, 6:25 PM
Time taken 29 mins 17 secs
Grade 15.00 out of 15.00 ( 100 %)
Select one:
a. smaller than
b. exactly
c. None of the answers are correct
d. larger than
e. the same as
The correct answer is: smaller than
½

29/1/18 11:38 am Quiz 4 F2017 (Covers Chapters 7, 8) - November 9th, 2017 at 16:00 for 24 Hours
Page 2 of 8
Question
2
Correct
Mark 1.00 out of
1.00
Question
Correct
3
Mark 1.00 out of
1.00
In a random sample of 651 computer scientists who subscribed to a web-
based daily news update, it was found that the average salary was $46,816
with a population standard deviation of $12,557. Calculate a 91 percent
confidence interval for the mean salary of computer scientists. Choose the
closest value from your table.
Whenever the population has a normal distribution, the sampling distribution
of xbar is a normal or near normal distribution

29/1/18 11:38 am Quiz 4 F2017 (Covers Chapters 7, 8) - November 9th, 2017 at 16:00 for 24 Hours
Page 3 of 8