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Review of Attempt 1
Started on:
Wednesday, 30 January 2008, 09:37 PM
Completed on:
Wednesday, 30 January 2008, 10:35 PM
Time taken:
57 mins 50 secs
Raw score:
7/10 (70%)
Grade:
7 out of a maximum of 10
(558)
1
Marks: 1
Suppose that the distribution of X in the population is strongly skewed to the left. If you took 200
independent and random samples of size 3 from this population, calculated the mean for each
of the 200 samples, and drew the distribution of the sample means, what would the sampling
distribution of the means look like?
Choose one answer.
a. On a pplot, most of the points will be on the line.
b. It will be close to the normal and the mean will be close to the median.
c. It will be perfectly normal and the mean will be equal to the median.
d. It will be skewed to the left and the mean will be less than the median.
Correct
Marks for this submission: 1/1.
(265)
2
Marks: 1
The standard error of the mean is a name for the standard deviation of the
Choose one answer.
a. parent population
b. sampling distribution of the mean
c. sampling distribution of the variance
d. sample
e. raw scores
Correct
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(1204)
3
Marks: 1
What is a practical application of the Central Limit Theorem?
Choose one answer.
a. It allows you to make inference about the population mean and percentage
b. It shows you the meaning of standard deviation over repeated samples
c. It relates to the normal distribution and the concept of Z and percentile
d. It gives you the message that you should pick as large of a sample as you can afford
Correct
Marks for this submission: 1/1.
(2485)
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This essay was uploaded on 04/21/2008 for the course STATS 112 taught by Professor Esfandini during the Spring '08 term at UCLA.
 Spring '08
 Esfandini

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