Probability and Statistics Quiz

Question 1

What does a high standard deviation indicate?

Accepted Answer

Data is spread out

Question 2

True or false: A mode can be more than one value.

Accepted Answer

True

Question 3

True or false: A binomial probability can be calculated using combinations.

Accepted Answer

True

Question 4

What is the mean of a data set?

Accepted Answer

Sum divided by count

Question 5

Which of the following is a measure of central tendency?

Accepted Answer

Mean

Question 6

Which of the following represents a binomial probability?

Accepted Answer

P(r) = nCr * p^r * q^(n-r)

Question 7

True or false: The sum of probabilities in a probability distribution equals 1.

Accepted Answer

True

Question 8

True or false: The normal distribution is always symmetric.

Accepted Answer

True

Question 9

What is the interquartile range?

Accepted Answer

Difference between Q1 and Q3

Question 10

What percent of data falls within 1 standard deviation of the mean in a normal distribution?

Accepted Answer

68%

Question 11

True or false: An outlier can significantly affect the mean.

Accepted Answer

True

Question 12

What is the probability of rolling a 3 on a number cube?

Accepted Answer

1/6

Question 13

What is the probability of getting at least one head in two coin flips?

Accepted Answer

3/4

Question 14

True or false: The expected value is the average of all possible outcomes weighted by their probabilities.

Accepted Answer

True

Question 15

Which of the following is a binomial experiment?

Accepted Answer

Flipping a coin multiple times

Question 16

True or false: The median is always the average of the highest and lowest values.

Accepted Answer

False

Question 17

What is the probability of getting exactly 2 successes in 5 trials with a success probability of 0.3?

Accepted Answer

0.263

Question 18

Which of the following is NOT a measure of central tendency?

Accepted Answer

Standard deviation

Questions 18