A testing bureau reports that the mean for the population
Question 1
5 out of 5 points
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A testing bureau reports that the mean for the population of Graduate Record Exam (GRE) scores is 500 with a standard deviation of 90. The scores are normally distributed.
The raw score that lies at the 90th percentile is _________.
Question 2
5 out of 5 points
Given the following set of sample raw scores, X: 1, 3, 4, 6, 8. What is the z transformed value for the raw score of 3?
Question 3
5 out of 5 points
A standardized test has a mean of 88 and a standard deviation of 12. What is the score at the 90th percentile? Assume a normal distribution.
Question 4
5 out of 5 points
The z score corresponding to the mean of a raw score distribution equals _________.
Question 5
5 out of 5 points
The mean of the z distribution equals _________.
Question 6
5 out of 5 points
An economics test was given and the following sample scores were recorded:
Individual
A
B
C
D
E
F
G
H
I
J
Score
12
12
7
10
9
12
13
8
9
8
The z score for individual E is _________.
Question 7
5 out of 5 points
Table A in your textbook has no negative z values, this means _________.
Question 8
0 out of 5 points
Which of the following z scores represent(s) the most extreme value in a distribution of scores assuming they are normally distributed?
Question 9
0 out of 5 points
You have just taken a standardized skills test designed to help you make a career choice. Your math skills score was 63 and your writing skills score was 45. The standardized math distribution is normally distributed, with m = 50, and s = 8. The writing skills score distribution is also normally distributed, with m = 30, and s = 10. Based on this information, as between pursuing a career that requires good math skills or one requiring good writing skills, you should chose _________.
Question 10
5 out of 5 points
A testing bureau reports that the mean for the population of Graduate Record Exam (GRE) scores is 500 with a standard deviation of 90. The scores are normally distributed.
The proportion of scores that lie between 460 and 600 is _________.
Question 11
5 out of 5 points
The mean of the z distribution equals _________.
Question 12
0 out of 5 points
A stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $8.52 with a standard deviation of $2.38.
What percentage of the distribution lies between $5 and $11?
Question 13
5 out of 5 points
A stockbroker has kept a daily record of the value of a particular stock over the years and finds that prices of the stock form a normal distribution with a mean of $8.52 with a standard deviation of $2.38.
The stock price beyond which 0.05 of the distribution falls is _________.
Question 14
5 out of 5 points
A testing bureau reports that the mean for the population of Graduate Record Exam (GRE) scores is 500 with a standard deviation of 90. The scores are normally distributed.
The percentile rank of a score of 667 is _________.
Question 15
5 out of 5 points
A distribution has a mean of 60.0 and a standard deviation of 4.3. The raw score corresponding to a z score of 2.02 is _________.
Question 16
5 out of 5 points
The normal curve is _________.
Question 17
0 out of 5 points
In a normal curve, the inflection points occur at _________.
Question 18
5 out of 5 points
A testing bureau reports that the mean for the population of Graduate Record Exam (GRE) scores is 500 with a standard deviation of 90. The scores are normally distributed.
The proportion of scores between 300 and 400 is _________.
Question 19
5 out of 5 points
A distribution has a mean of 60.0 and a standard deviation of 4.3. The raw score corresponding to a z score of 0.00 is _________.
Question 20
5 out of 5 points
On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what percentage of scores fall between 70 and 80?