Question

2. The big five parameters Aa Aa For each question posed below determine the corresponding statistical situation, the population parameter and its sample estimate What is the mean difference in height What proportion of statisticians eaned between adult identical twins? $60,000 or greater in 2009? Which of the following statistical situations best describes the Which of the following statistical situations best describes the question posed above? question posed above? O Estimating the proportion falling into a category of a O Estimating the mean of a quantitative variable O Estimating the mean of paired differences for a categorical variable O Estimating the mean of paired differences for a quantitative variable O Estimating the difference between two populations quantitative variable O Estimating the difference between two populations with regard to the mean of a quantitative variable O Estimating the proportian fallling into a category of a with regard to the mean of a quantitative variable O Estimating the difference between two populations categorical variable with regard to the propartions falling into a category of a categorical variable The corresponding population parameter for this situation is The corresponding population parameter for this situation is and its sample estimate is and its sample estimate is What was the mean starting salary for a How much difference is there between the statistician in 2009? mean salary for males and females in North Dakota? Which of the following statistical situations best describes the Which of the following statistical situations best describes the question posed above? question posed above? O Estimating the mean of paired differences for a O Estimating the mean of a quantitative variable O Estimating the difference between two populations quantitative variable O Estimating the mean of a quantitative variable O Estimating the proportion falling into a category of a with reqard to the mean of a quantitative variable O Estimating the proportion falling into a category of a categorical variable categorical variable O Estimating the difference between two populations O Estimating the difference between two populations with regard to the mean of a quantitative variable with regard to the proportions falling into a category of a categorical variable The corresponding population parameter for this situation is The corresponding population parameter for this situation is and its sample estimate is and its sample estimate is

Answer 1

What is the mean difference in height between adult identical twins?

BEST STATISTICAL SITUATION: Option (b): Estimating the mean of paired differences for a quantitative variable.

The corresponding population parameter for this situation is the population mean difference in height between adult identical twins
d
and its sample estimate is the sample mean of paired difference in height between adult identical twins
(dbar
.

What proportion of statisticians earned $60,000 or greater in 2009?

BEST STATISTICAL SITUATION: Option (d): Estimating the proportion falling into a category of a categorical variable.

The corresponding population parameter for this situation is the population proportion of statisticians who earned in 2009
(p)
and its sample estimate is the sample proportion of statisticians who earned $60,000 or greater in 2009
(Phat
.

What was the mean starting salary for a statistician in 2009?

BEST STATISTICAL SITUATION: Option (b): Estimating the mean of a quantitative variable.

The corresponding population parameter for this situation is the population mean starting salary for statistician in 2009 $(\mu )$and its sample estimate is the sample mean starting salary for statistician in 2009
Ibar
.

How much difference is there between the mean salary for males and females in North Dakota?

BEST STATISTICAL SITUATION: Option (b): Estimating the difference between two populations with regard to the mean of a quantitative variable.

The corresponding population parameter for this situation is the population mean difference in salary for males and females in North Dakota
1
and its sample estimate is the sample mean difference in salary for males and females in North Dakota
r 2ar
.