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Data Analysis and Statistics Flashcards

7 cards from real ERB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Data Analysis and Statistics flashcards as text

  1. Test scores are 72, 85, 91, 64, and 88. What is the range?

    Answer: 27

    Range = highest − lowest = 91 − 64 = 27.

  2. Maya's mean score on 6 tests is 84. What must she score on the 7th test to raise her mean to 85?

    Answer: 91

    She needs a total of 7 × 85 = 595, and 595 − 504 = 91.

  3. Two coins are flipped and one number cube is rolled. How many outcomes are in the sample space?

    Answer: 24

    By the counting principle, 2 × 2 × 6 = 24.

  4. In a circle graph, a category represents 15% of a budget. What is the central angle of its sector?

    Answer: 54°

    0.15 × 360° = 54°.

  5. A bag holds 4 blue and 6 green marbles. Two are drawn without replacement. What is the probability both are green?

    Answer: 1/3

    6/10 × 5/9 = 30/90 = 1/3.

  6. For the data set 2, 3, 3, 4, 48, which statistic best describes the typical value?

    Answer: Median

    The outlier 48 pulls the mean up to 12, but the median of 3 reflects most of the data.

  7. A number cube is rolled 60 times and lands on 6 a total of 15 times. What is the experimental probability of rolling a 6?

    Answer: 1/4

    Experimental probability = 15/60 = 1/4.

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Data Analysis and Statistics Flashcards — ERB Study Cards with Answers