STATISTICAL TECHNIQUES AND TOOLS
SAMPLING DISTRIBUTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
78% is a population and 72% is a sample.
|
|
|
72% is a population and 78% is a sample
|
|
|
78% is a parameter and 72% is a statistic
|
|
|
72% is a parameter and 78% is a statistic
|
Detailed explanation-1: -At a particular college, 78% of all students are receiving some kind of financial aid. The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true?-the statistic is calculated from a random sample.
Detailed explanation-2: -Regardless of the distribution of the population, as the sample size is increased the shape of the sampling distribution of the sample mean becomes increasingly bell-shaped, centered on the population mean.
Detailed explanation-3: -The sampling distribution of a statistic is the distribution of all possible values taken by the statistic when all possible samples of a fixed size n are taken from the population. It is a theoretical idea-we do not actually build it.