Sampling Distributions - Chapter 6

Suppose we want to divide our standard deviation by 3. We should:

As sample size increases, the spread of a sampling distribution:

A distribution that shows the behavior of a statistic over all possible samples, n, is called:

We use x-bar to estimate:

As n increases, the distribution of sample means becomes more Normal. This describes:

Values that describe a characteristic of a population are called:

Suppose p = .7 but p-hat is .67. What conclusion can we draw about p?

We randomize to ensure that we get ________ .

What sample size ensures the sampling distribution for x-bar is approximately normal?

Suppose ρ = .8 and n = 1000. Find the probability of getting a p-hat of less than .78.

Statistics based on larger samples are more

If X is normally distributed, what is the minimum size n for x-bar to be normally distributed?

A population is normal with u = 100 and δ = 15. If n=25, then the SD of sample means=

The 10/10 condition ensures that the sampling distribution for a sample proportion has

When sampling without replacement, our sample size should be:

A population is normal with u = 100 and δ = 15. For samples of n=10, find P(x-bar > 105).

Which of the following represents a population parameter and is not a sample statistic?

A sample statistic is an unbiased estimator if:

Suppose ρ = .8 and n = 1000. Find the standard deviation for p-hats.