I need some explanation as well please All the female studen

I need some explanation as well please.

All the female students who take part in our online class can be described as what (select the best response)?

A. sample

B. portion

C. level of measurement

D. population

E. Both a and d are correct

Relative frequency distributions allow us to focus on

A. the part or fraction of the total frequency that occupies each class

B. the relative density of observations among difference classes or catergories within the same distribution

C. the shapes of two or more distributions based on different total numbers of observations

D. all of the above

What is a negative quality of the range?

A. shows dispertion

B. it is affected by outliers (extremes)

C. it ignores some data

D. it is hard to calculate

E. it doesn\'t exist for some quantitative data

A method of dispersion that gives us an overall picture of the gap between all the data within a data set is

A. Range

B. Inter quartiler range Q3-Q1

C. Mean

D. Standard Deviation

E. Coefficient of correlation

You have used the significant level of 0.01 to estimate the average hours of television viewing for the NJ students. What is the chance that our interval estimate does not contain the true population mean?

A. 99%

B. 10%

C. 100%

D. 1%

E. None of the above

Stratified Random Sampling involves:

A. Dividing the population into overlapping groups

B. Taking a random sample of a percentage of the pre chosed groups (usually 10% of total groups)

C. Choosing non overlapping clusters (streets of a city for example) and collecting data from all members of the selected cluster

D. None of the above

All the female students who take part in our online class can be described as what