Q5A2 take this quiz from Sunday 17th at 6:00 PM to Tuesday 19th at 11:00
AM
Review of Attempt 1
Started on:
Monday, 18 February 2008, 10:10 PM
Completed on:
Monday, 18 February 2008, 11:10 PM
Time taken:
1 hour
Raw score:
8/10 (80%)
Grade:
8 out of a maximum of 10
1
Marks: 1
The null hypothesis is that the average annual income in a certain country is $25,000.00
Linda is wondering whether the annual income of the people living in his suburb is higher than
the overall population. Thus, she takes a random sample of 121 families from her suburb and
computes the 95% confidence of annual income and finds it to be:
$22,000:00 to 28,000:00
Given that she did not make any calculation error in the computation of the confidence interval,
what is the best answer.
Choose one answer.
a. Her sample size is not large enough to decide about rejecting or not rejecting the null;
she needs a larger sample.
b. She should find the P value to be less than 0.05 and she should not reject the null.
c. She should find the P value to be less than 0.05 and she should reject the null.
d. She should not have calculated the confidence interval for the mean; instead she should
have calculated the confidence interval for the proportion.
Correct
Marks for this submission: 1/1.
(3264)
2
Marks: 1
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View Full DocumentGiven the following:
Mue IQ in the population= 100
sigma or sd of IQ in the population = 15
For a random sample of 25 adults who work in a brick factory Xbar for IQ = 104
H0: mue = 100
Ha: Mue # 100 (# means does not equal)
What is your decision regarding the null?
Choose one answer.
a. We should reject the null and conclude that the mean IQ for the employees of the brick
factory is larger than 100.00
b. We should reject the null and conclude that the mean IQ for the employees of the brick
factory is different from 100.00
c. We fail to reject the null and conclude that the the mean IQ for the employees of the
brick factory is not different from 100.
d. We cannot decide whether we should reject or fail to reject the null hypothesis because
the P value is not given.
Correct
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 Spring '08
 Esfandini
 Statistical hypothesis testing, credit card debt, Terri, Correct Marks

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