Do you need a quick refresher course in Statistics. Why not try to answer these 10 questions. Remember any Statistics student that can answer all 10 questions correctly will be eligible to participate in the next free test.

QUESTION 1

Which of the following could not be a measure of probability?
A 100%
B 80%
C 140%
D 0%

QUESTION 2

The probability of throwing 3 consecutive “tails” on the first 3 throws of a fair coin would be:
A 0.0625
B 0.250
C 0.125
D 0.500

QUESTION 3

The probability of the numbers 8 and 19 appearing simultaneously on a single spin of a roulette wheel would be:
A 1/37
B 0
C 1/(37)2
D 0.50

QUESTION 4

Consider the following probabilities for two events A and B:
Pr(A) = 0.90 Pr(B) = 0.10 Pr(AandB) = 0.20

A Pr(AorB) = 0.50
B Pr(AorB) = 0.80
C Pr(AorB) = 1.00
D Pr(AorB) = 0.45

QUESTION 5

Consider the following probabilities for two events X and Y:
Pr(X) = 0.40 Pr(Y) = 0.400 Pr(XandY) = 0.100

A Pr(X/Y) = 0.250 (Pr(X/Y) = probabilty of X given Y)
B Pr(X/Y) = 0.100
C Pr(X/Y) = 0.700
D Pr(X/Y) = 0.800

QUESTION 6

Consider the following probability for two events X and Y:
Pr(XandY) = 0

A Events X and Y are independent.
B Events X and Y are not complementary.
C Events X and Y are not mutually exclusive.
D Events X and Y are mutually exclusive.

QUESTION 7

A fair die is thrown three times. The probability of the number 2 appearing on every throw would be:
A 0.00077
B 0.02778
C 0.16670
D 0.00463

QUESTION 8

The probability of an Olympic gold medal winner being eaten by a tiger in Shanghai in 2008, while competing in a swimming event would be:
A 90%
B 20%
C 0.0000000000000000001%
D -0.0000000000000000001%

QUESTION 9

On a box plot, the upper and lower steps are used for:
A calculating the range
B calculating the standard deviation
C determining the median
D detecting outliers

QUESTION 10

An outlier is any value in the data set that:
A is very close to the mean
B is one standard deviation below the mean
C is very far from the mean
D is greater than the variance

Source:
Statistics Study Guide (Introduction to Statistics)
Henry Gersh
Habiba Emadi Keshtiar

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