Ch. 2 Review (2.1, 2.4, 2.5, 2.6)

Ch. 2 Review (2.1, 2.4, 2.5, 2.6)

Assessment

Flashcard

Mathematics

12th Grade

Hard

CCSS
HSS.ID.A.4, 6.SP.B.5C

Standards-aligned

Created by

Wayground Content

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the mean in a data set?

Back

The mean is the average of all data points, calculated by summing all values and dividing by the number of values.

Tags

CCSS.6.SP.B.5C

2.

FLASHCARD QUESTION

Front

What does standard deviation measure?

Back

Standard deviation measures the amount of variation or dispersion in a set of values.

3.

FLASHCARD QUESTION

Front

What is a percentile?

Back

A percentile indicates the value below which a given percentage of observations fall.

Tags

CCSS.6.SP.B.5C

4.

FLASHCARD QUESTION

Front

What is the empirical rule in statistics?

Back

The empirical rule states that for a normal distribution, approximately 68% of data falls within one standard deviation of the mean, 95% within two, and 99.7% within three.

Tags

CCSS.HSS.ID.A.4

5.

FLASHCARD QUESTION

Front

If a test has a mean of 80 and a standard deviation of 9, what is the z-score for a score of 76?

Back

Z-score = (X - mean) / standard deviation = (76 - 80) / 9 = -0.44.

6.

FLASHCARD QUESTION

Front

What is the significance of a z-score?

Back

A z-score indicates how many standard deviations an element is from the mean; it helps in understanding the position of a score in a distribution.

7.

FLASHCARD QUESTION

Front

What percent of data lies within one standard deviation of the mean in a normal distribution?

Back

Approximately 68% of the data.

Tags

CCSS.HSS.ID.A.4

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