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Author Question: At a highway checkpoint, the average speed of a passing car was measured at 50 miles per hour with a ... (Read 351 times)

stephzh

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on: Jun 24, 2018
At a highway checkpoint, the average speed of a passing car was measured at 50 miles per hour with a standard deviation of 5 miles per hour.
 
  According to Chebyshev's Theorem, what percentage of cars would you expect to be traveling between 42.5 and 57.5 miles per hour?
  A) at least 50
  B) at least 55.6
  C) at least 75
  D) at least 88.9

Question 2

The standard deviation of a discrete random variable  is the positive square root of its:
 
  A) variance.
  B) mean.
  C) median.
  D) mode.


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elizabethrperez

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Reply #1 on: Jun 24, 2018
Answer to Question 1

B

Answer to Question 2

A


stephzh

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Reply #2 on: Jun 24, 2018
Correct answers!


elizabethrperez

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Reply #3 on: Jun 24, 2018
Great! Please up vote :D


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