Z-scores
What is the z-score of a data point that is equal to the mean?
0
What is the percentile of a data point equal to the mean?
%50
.13591
A test has a mean score of 40 and standard deviation of 3. What score would you need in order to be in the 50th percentile?
40
What is Mr. Golden's wife's maiden name?
Ms. Bray
Find the z-score of 76 if the mean is 100 and the standard deviation is 10
-2.4
Mean = 18, Standard Deviation = 3, X = 20
.74857
We have z-scores of 0.48 and 1.92. What percent of our data is in between these z-scores?
.28818
A test has a mean of 40 and a standard deviation of 3. What score would you need in order to be in the 75th percentile?
42.01
Name both teams in the super bowl
Chiefs and Eagles
Find the z-score of 10 when the mean is 12 and the standard deviation is 1
-2
Z = -3.5
What is the percentile?
.00023
Bob scored a 10 and Tom scored a 12 on a test with mean of 11 and standard deviation of 1. What percent of people scored in between Bob and Tom's scores?
.68268
What score would be in the 35th percentile?
38.83
Name one of the math words that we've used to describe the normal distribution
symmetric, unimodal
Find the z-score of 23.4 when the mean is 20 and the standard deviation is 4.
0.85
What z-score corresponds closest to the 80th percentile?
.84
Zariah scored a 30 and Raul scored a 25 on a test with mean of 30 and standard deviation of 3. What percent of people scored between Zariah and Raul?
.45254
A test has a mean of 100 and a standard deviation of 15. What score would be the 25th percentile?
89.95
Name the three trigonometric functions
sin, cos, tan
Find the z-score of -14 when the mean is 4 and the standard deviation is 20
-0.9
What is my percentile if I score a 75 on a test that has a mean of 76 and a standard deviation of 4
.40129
What z-scores represent the middle 60 percent of our data?
-0.84 and 0.84
A test has a mean of 350 and standard deviation of 50. What score would give use the 99th percentile?
466.5
Phil Simms