Quantitative Data and Probability True or False

1.

Which of the following is the formula for the expected value? -> EV = x₁p₁ + x₂p₂ + … + x_np_n
True False

2.

How do we interpret the expected value of an event? -> As the long-term average result.
True False

3.

A weighted die is thrown 12 times, giving the following results. From these data, what is the expected value for a single die roll?

-> 0
True False

4.

We flip a coin 5 times. What is the expected value for the number of heads. -> 4
True False

5.

Which summary statistic is most strongly affected by outliers? -> Mean
True False

6.

What is the median of {1, 2, 3, 4, 5, 6, 7}? -> 4
True False

7.

What is the mean of {2, 3, 5, 6}? -> 4
True False

8.

A dataset has (x – x) values of 3, 4, and 5. What is the standard deviation? ->

True False

9.

Which dataset has a mean of 6? -> {2, 14, 9}
True False

10.

Which of the following is NOT true about the standard deviation? -> It uses n – 1 in its formula.
True False

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