
Understanding Z-Scores and Performance Evaluation

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 is the primary purpose of a z-score?
To measure the absolute value of a score
To standardize a score by showing its distance from the mean
To calculate the average of a data set
To determine the median of a data set
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why might a raw score be misleading when evaluating performance?
Raw scores are always accurate
Raw scores do not account for the difficulty of the test
Raw scores are the same as z-scores
Raw scores are always below the mean
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for calculating a z-score?
Z = (X - mean) * standard deviation
Z = (X + mean) / standard deviation
Z = (mean - X) / standard deviation
Z = (X - mean) / standard deviation
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mean of a standard normal distribution?
-1
2
1
0
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to the empirical rule, what percentage of data falls within one standard deviation of the mean?
99.7%
95%
50%
68%
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example given, how did Emily's performance in English compare to her cohort?
She performed better than average
She performed exactly at the average
Her performance was not compared
She performed worse than average
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is one key takeaway about z-scores from the video?
Z-scores are always positive
Z-scores are not related to standard deviations
Z-scores help in comparing different data sets
Z-scores are only useful for math exams
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