Binomial Probability Distribution Quiz Review Stat2

Question 1

Flip a coin 800 times. The standard deviation of the distribution with tails being a success is

Accepted Answer

14.142

Question 2

If 60% of adults celebrate Halloween, what is the probability that exactly 2 out of 6 believe?

Accepted Answer

.1382

Question 3

65% of seniors have a job. Find the probability that more than 30 out of 40 have jobs.

Accepted Answer

.0644

Question 4

Flip a coin 80 times. Let "tails" be a success. Find the mean of the distribution.

Accepted Answer

40

Question 5

What graph is commonly used to show Probability Distributions?

Accepted Answer

Histogram

Question 6

What is the binomial formula?

Accepted Answer

nCrprq(n-r)

Question 7

A Binomial Distribution has a fixed number of trials?

Accepted Answer

True

Question 8

In order to be a Binomial Probability Experiment, there are only two outcomes.

Accepted Answer

True

Question 9

What is the probability that a family has between 2 and 5 (inclusive) girls out of 10 children?

Accepted Answer

.612

Question 10

30% like Cadbury eggs. What is the probability that 10 out of 50 people like them?

Accepted Answer

.039

Question 11

If p = .75, then q = ?

Accepted Answer

.25

Question 12

Probability distributions always add up to?

Accepted Answer

1

Question 13

A Binomial Distribution does not have to have independent trials.

Accepted Answer

False

Question 14

The formula for the mean of a Binomial Distribution is?

Accepted Answer

mean = n x p

Question 15

65% of seniors have jobs. What is the probability that no more than 60 out of 100 have jobs?

Accepted Answer

.172

Question 16

Probability distributions are not expressed in what format?

Accepted Answer

layout

Question 17

Flip a coin 80 times. What is the probability that between 50 and 70 inclusive flips are tails?

Accepted Answer

.0165

Question 18

A family wants to have 6 children. What is the probability that they have exactly 4 boys?

Accepted Answer

.234

Questions 18