Distribution Shape
Z-Scores
Empirical Rule
Random Trivia!
100
What does symmetric mean?
The same on both sides.
100
The z-score for a data point is 2. Is the data point above or below the mean?
Above
(2 standard deviations above because it is a positive 2)
100
Mean = 50. Standard deviation = 5.
How many standard deviations is 40 away from the mean?
-2 (2 below)
100
How many ounces are in a pound?
16
200
True or False. The distribution below is approximately normal.
True
200
Starting salaries at a tech company are approximately normally distributed with a mean of 60,000 and a standard deviation of 3,000.
If Joe's starting salary has a z-score of +2, find Joe's starting salary.
66,000
200
Mean = 25. Standard deviation = 3.
What percent of the data is between 22 and 31?
81.5%
200
What is the name of this pokemon?
Bulbasaur
300
What does unimodal mean?
1 peak
300
The grades on a midterm are approximately normal with a mean of 73 and standard deviation of 3.
Uma scored 72 on the exam.
Find the z-score for Uma's exam grade. Round to two decimal places.
-0.33
300
Mean = 25. Standard deviation = 3.
What percent of the data is above 22?
84%
300
About what percent of the population live in the Northern Hemisphere?
About 90%
(will accept anywhere from 85-95)
400
Describe the shape of the distribution.
Unimodal, Skewed Right
400
The grades on a math test are approximately normal with a mean of 76 and a standard deviation of 4.5
Daniel scored 88 on the exam.
Find the z-score for Daniel's exam grade. Round to two decimal places.
2.67
400
Mean = 20. Standard deviation = 2.
What percent of the data is between 16 and 24?
95%
400
Who won the first world cup?
Uruguay
500
Describe the shape of the distribution below.
Bimodal, Symmetric
500
Starting salaries at a tech company are approximately normally distributed with a mean of 60,000 and a standard deviation of 3,000.
Ava's starting salary is 64,000. Find the z-score for Ava's starting salary. Round to two decimal places.
1.33
500
Mean = 20. Standard deviation = 2.
What percent of the data is below 16?
2.5%