7.1 Intro to Sampling Distributions

Is the 71% who say "yes" a parameter or a statistic?

• parameter

• statistic

• neither

What notation should we use for the 71% since it is a sample proportion?

• P-hat

• P

• Mu (μ)

• X-bar

Is the number "3 ounces" a parameter or a statistic?

• parameter

• statistic

• neither

Since "3 ounces" describes the population, what is the appropriate notation that should be used for it?

• Mu (μ)

• x-bar

• p-hat

• P

We are about to calculate the mean of all of the sample means. In order to do so, you should prepare to enter 2 of these rows into your calculator into lists. Program the sample means (middle row) into L1 and the frequency (bottom row) into L2. Once you do so, you will calculate the mean of all of these dice roll sum means the same way you calculated weighted mean from last chapter. That would be you calculate 1 variable statistics using L1 in your x-list and L2 in the frequency list. 

What is the mean of these sample means using this method of calculation? (1-variable statistics using L1 in your x-list and L2 in the frequency list)

• 7

• 3.5

• 3.27