Question 1
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 2
5 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 3
5 out of 5 points
The z score corresponding to a raw score of 120 is _________.
Question 4
0 out of 5 points
The mean of the z distribution equals _________.
Question 5
5 out of 5 points
If you transformed a set of raw scores, and then added 15 to each z score, the resulting scores _________.
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 mean of the distribution is _________.
Question 7
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 -1.51 is _________.
Question 8
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 9
5 out of 5 points
In a normal curve, the inflection points occur at _________.
Question 10
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 11
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 percentage of scores that lie between $9.00 and $10.00 is _________.
Question 12
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 below a score of 83.8?
Question 13
5 out of 5 points
The z score corresponding to the mean of a raw score distribution equals _________.
Question 14
0 out of 5 points
If a population of scores is normally distributed, has a mean of 45 and a standard deviation of 6, the most extreme 5% of the scores lie beyond the score(s) of _________.
Question 15
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 16
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 17
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 18
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 standard deviation of the distribution is _________.
Question 19
5 out of 5 points
If a distribution of raw scores is negatively skewed, transforming the raw scores into z scores will result in a _________ distribution.
Question 20
0 out of 5 points
The standard deviation of the z distribution equals _________.
