True Or False

Question 1

For a discrete probability distribution for every possible X value zero is less than or equal to p(x) less than or equal to 100

Answer 1

False

Question 2

For a discrete probability distribution the sum over all possible X values of p(x) is equal to one

Answer 2

True

Question 3

P hat denotes the population proportion of successes

Answer 3

False

Question 4

The value of the sample proportion P hat varies from one random sample to another

Answer 4

True

Question 5

The farther the value of P is from .5 the larger n has to be in order for P hat to have a sampling distribution, that is approximately normal

Answer 5

True

Question 6

The sampling distribution of P hat is approximately normal if the sample size is larger enough to expect at least 10 successes, and at least 10 failures in the sample

Answer 6

True

Question 7

A sample size of 100 is by itself enough to say that the sampling distribution of p hat is approximately normal

Answer 7

False

Question 8

A statistic that is biased and has a small standard error is likely to result in an estimate that is close to the actual value of the population characteristic

Answer 8

False

Question 9

The sample range is an example of an estimator that is biased

Answer 9

True

Question 10

When condition that must be met when calculating the margin of error when P hat is used to estimate p is that the sample must be random or Representative

Answer 10

True

Question 11

P hat denotes the population probability of a success

Answer 11

False

Question 12

Increasing sample size increases the standard error

Answer 12

False

Question 13

The z critical value for a 95% confidence interval is 2.58.

Answer 13

False

Question 14

Increasing confidence will create a smaller confidence, interval

Answer 14

False

Question 15

Increasing sample size will create a smaller confidence, interval

Answer 15

True