Question 1
0 out of 5 points
Assuming the z scores are normally distributed, what is the percentile rank of a z score of -0.47?
Question 2
5 out of 5 points
In a normal curve, the inflection points occur at _________.
Question 3
5 out of 5 points
How much would your income be if its z score value was 2.58?
Question 4
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 5
0 out of 5 points
All bell-shaped curves _________.
Question 6
0 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 7
0 out of 5 points
A set of raw scores has a rectangular shape. The z transformed scores for this set of raw scores has a _________ shape.
Question 8
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 9
0 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 mean of the distribution is _________.
Question 10
0 out of 5 points
In a normal distribution approximately _________ of the scores will fall within 1 standard deviation of the mean.
Question 11
0 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 12
0 out of 5 points
A distribution of raw scores is positively skewed. You want to transform it so that it is normally distributed. Your friend, who fancies herself a statistics whiz, advises you to transform the raw scores to z scores; that the z scores will be normally distributed. You should _________.
Question 13
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.
The percentile rank of a price of $13.87 is _________.
Question 14
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 is the percentile rank of a score of 56?
Question 15
0 out of 5 points
Table A in your textbook has no negative z values, this means _________.
Question 16
0 out of 5 points
The z score corresponding to a raw score of 120 is _________.
Question 17
0 out of 5 points
Makaela took a Spanish exam; her grade was 79. The distribution was normally shaped with = 70 and s = 12. Juan took a History exam; his grade was 86. The distribution was normally shaped with = 80 and s = 8. Which did better on their exam relative to those taking the exam?
Question 18
0 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 19
0 out of 5 points
You have just received your psychology exam grade and you did better than the mean of the exam scores. If so, the z transformed value of your grade must
Question 20
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.
The percentage of scores that lie between $9.00 and $10.00 is _________.
