
Understanding Z-Scores and Their Calculations

Interactive Video
•
Mathematics
•
9th - 10th Grade
•
Hard

Thomas White
FREE Resource
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7 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a z-score indicate about a data value?
The absolute value of the data point
The number of standard deviations a data point is from the mean
The sum of all data points
The median of the data set
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which symbol represents the mean in the z-score formula?
Beta (β)
Sigma (σ)
Mu (μ)
Alpha (α)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a z-score is negative, what does it tell us about the data value?
The data value is the highest in the set
The data value is equal to the mean
The data value is below the mean
The data value is above the mean
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Given a mean of 24 and a standard deviation of 5, what is the z-score for a data value of 20?
0.8
1.0
-1.0
-0.8
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you calculate a z-score?
Divide the data point by the mean and subtract the standard deviation
Add the mean to the data point and divide by the standard deviation
Multiply the data point by the mean and divide by the standard deviation
Subtract the mean from the data point and divide by the standard deviation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a z-score of -0.8 indicate about the data point's position relative to the mean?
The data point is 1 standard deviation below the mean
The data point is exactly at the mean
The data point is 0.8 standard deviations below the mean
The data point is 0.8 standard deviations above the mean
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a data point is exactly 1 standard deviation away from the mean, what would its z-score be?
0
-1
1
Either 1 or -1
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