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CBEST — free MCQ practice

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CBEST subjects

Mathematics (47)

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Descriptive StatisticsProbability Topics

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Which measure of the center is found by adding every value and dividing by how many there are?Read the answer and worked solution →Which measure of the center is simply the value that appears most often?Read the answer and worked solution →What name is given to a data set that has two modes?Read the answer and worked solution →How many values does it take to build a box plot?Read the answer and worked solution →

Worked practice questions

Which measure of the center is found by adding every value and dividing by how many there are?

  1. The median
  2. The mode
  3. The mean
  4. The range
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Correct answer: C. The mean

1. Adding up the values and sharing the total out equally is the everyday idea of an average. 2. In statistics that calculation is called the mean. 3. The median instead splits ordered data into halves, so it is found by sorting rather than adding. _Source: OpenStax High School Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics" and Ch 3 "Probability Topics", section 2.5 Measures of the Center of the Data_

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Which measure of the center is simply the value that appears most often?

  1. The mode
  2. The mean
  3. The median
  4. The middle
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Correct answer: A. The mode

1. Some questions ask which value turns up most, not which value is typical on average. 2. The most frequent value in a data set is the mode. 3. The mean and the median can both land on a value that never appears in the data at all. _Source: OpenStax High School Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics" and Ch 3 "Probability Topics", section 2.5 Measures of the Center of the Data_

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What name is given to a data set that has two modes?

  1. Skewed
  2. Unimodal
  3. Rounded
  4. Bimodal
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Correct answer: D. Bimodal

1. A data set can have more than one most frequent value if two values tie for the top count. 2. When exactly two values tie in that way, the data set is called bimodal. 3. Unimodal describes a data set with a single mode instead. _Source: OpenStax High School Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics" and Ch 3 "Probability Topics", section 2.5 Measures of the Center of the Data_

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