Sample Distributions

Question 1

What is “p”?

Answer 1

population proportion

Question 2

What is “p̂ “?

Answer 2

sample proportion

Question 3

What is “n”?

Answer 3

sample size

Question 4

What is the mean of the sampling distribution?

Answer 4

µ_{p̂ =p}

Question 5

What is Sample Distribution?

Answer 5

Collection of all samples from the same size and same distribution.

Question 6

What is the standard deviation of the sampling distribution?

Answer 6

Question 7

Rules of Thumb

Answer 7

1. population is 10x bigger than sample
2. np≥10 and n(1-p)≥10

Question 8

What is a Parameter?

Answer 8

A number that describes a population.

(ex. µ, σ, p)

Question 9

How do you determine the center for sample distributions for sample means?

Answer 9

The mean is the Center. The mean of sampling distributions is equal to the population mean.

µ_x=µ

Question 10

What is the equation for determining the spread of Sampling Distributions for Sample means?

Answer 10

σ_x=σ/√n

Question 11

What is a Statistic?

Answer 11

A number that can be computed from the sample data without making use of any unknown parameter.

(ex. x¯, s, p^)

Question 12

What are the Rules of Thumb for Sampling Distributions?

Answer 12

1. Use the previous formulas for mean and standard deviation of