Random Cory Trivia
Z-Score
Mean/Standard Deviation
Table A
Proportions
100
What university did Cory attend?
Florida State University
100
The mean is 80 and the standard deviation is 10. What is the standard score (z-score) for an observation of 90?
1.0
100
The distribution of scores on an SAT exam is Normal, with mean 500 and standard deviation 100. So the median score on the exam is...
500
100
What proportion of scores in a standard Normal distribution are below z=-1.4?
0.0808
100
Given an normal distribution with a mean of 25 and a standard deviation of 1.3, what proportion of values fall below x = 25?
0.5000
200
What is Cory's daughter's name? (spelling counts)
Sofie
200
Samir earned an 88 on a test for which the class mean was 78 and the standard deviation was 8. Samir's standardized score (z-score) was...
1.25
200
If the mean of a normal distribution is 14 and its standard deviation is 1.4, what is the variance of the normal distribution?
1.96
200
What proportion of scores in a standard Normal distribution that are between -2.1 and 0?
.4821
200
For a Normal distribution with mean 20 and standard deviation 5, approximately what proportion of the observations will be greater than 20?
0.5000
300
For what university does Cory's wife work?
George Washington University
300
The mean height of a certain type of tree is 69.5 inches and the standard deviation is 2 inches. A certain tree is 73.5 inches tall. The z-score for his height is...
2
300
The distance from the mean to the ________ on a normal distribution is exactly one standard deviation.
Inflection point
300
What proportion of scores in a standard Normal distribution that are between -2.1 and 1.1?
.8464
300
For a Normal distribution with mean 20 and standard deviation of 1.4, approximately what proportion of values will be less than 19.2?
.2843
400
This is Cory's _________ year of teaching.
19th
400
The distribution of heights of adult of adult men is approximately Normal with mean 69 inches and standard deviation 2.5 inches. How tall is a man whose standardized height is -0.3?
68.25
400
What is the mean of this Normal distribution?
75
400
What is the z-score at the 62nd percentile of a standard Normal distribution?
0.31
400
For a normal distribution with a mean of 10 and a standard deviation of 1, what proportion of values are above 9.2?
.7881
500
How many followers does Cory have on instagram?
728
500
What is the equation for z-score?
z=(x-mean)/standard deviation
500
What is the mean and standard deviation of a standard Normal distribution?
mean=0
standard deviation=1
500
What proportion of observations from a Normal distribution fall above a z score of 1.33?
.0918
500
The proportion of observations that fall below a value is 0.9656. What is the z-score of that value?
1.82