
ECON2122 - Chapter 678 - Review
Authored by Phuong Vu
Social Studies
University
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The variance of the sampling distribution of the sample mean is equal to the variance of the population mean divided by the square root of the sample size
TRUE
FALSE
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
TRUE
FALSE
3.
OPEN ENDED QUESTION
1 min • 1 pt
The length of time it takes to fill an order at a local sandwich shop is normally distributed with a mean of 4.1 minutes and a standard deviation of 1.3 minutes.
What is the probability that the average waiting time for a random sample of ten customers is greater than 4 minutes.
(Provide the equivalent Z problem only)
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OFF
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When computing the confidence interval for the population proportion, the Student's t-distribution is used rather than the normal distribution.
TRUE
FALSE
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
As the confidence level for a confidence interval increases, the width of the interval also increases.
TRUE
FALSE
6.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
59
73
61
55
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