In evaluating student performance, a recent analysis was conducted on the scores of three different standardized tests taken by 50 students at a local middle school. The average scores for each test are as follows: Test X: 78 Test Y: 85 Test Z: 73 The scores for each test follow a normal distribution. To better understand the data, the standard deviations for each test are: Test X: 10 Test Y: 5 Test Z: 12 Which test has the highest variability in scores among the students?

Exam

ISEE Middle Level

Section

Difficulty

Quantitative Reasoning

Comparing Variability of Test Scores

Hard Quantitative Comparisons Data Analysis

In evaluating student performance, a recent analysis was conducted on the scores of three different standardized tests taken by 50 students at a local middle school. The average scores for each test are as follows:

Test X: 78
Test Y: 85
Test Z: 73

The scores for each test follow a normal distribution. To better understand the data, the standard deviations for each test are:

Test X: 10
Test Y: 5
Test Z: 12

Which test has the highest variability in scores among the students?

Test X

Test Y

Test Z

All tests have the same variability

Hint

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