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Summary Statistics for a Quantitative Variable

AP Statistics· difficulty 3/5

If Y = 2X + 5 and X has mean 10, then mean of Y is

  • A

    25

    check_circle
  • B

    30

  • C

    10

  • D

    20

Explanation

E(aX + b) = a·E(X) + b = 2·10 + 5 = 25.

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