AP Stat Quiz 7.1 Review

What does this symbol represent?

• parameter
• sample proportion
• parameter of a population
• population proportion

What does this symbol represent?

• population proportion
• parameter
• sample proportion
• population sample

53.2% of applicants are accepted into UConn. In a sample of 100 UConn applicants, 45 of them were accepted. What is the parameter?

• All UConn applicants.

• The 100 applicants in the sample.

• 53.2% acceptance rate.

• 45% of accepted in sample.

If you had to choose a "best statistic" to describe a population, which of the following would be best.

• low bias, high variability
• high bias, high variability
• low bias, low variability
• high bias, low variability

The sampling distribution of a statistic is...

• Using repeated samples and finding a probabilitity
• The distribution of values taken by a statistic in all possible samples of the same sample size from the same population
• The way that sample results differe from each other
• the distribution of values in a sample of size n

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?

•  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

These symbols represent the mean and standard deviation for which of the following distributions?

• The Population
• The Sample
• The Sampling Distribution

True or False: A statistic used to estimate a parameter is an unbiased estimator if the mean of its sampling distribution is equal to the value of the parameter being estimated.

• True

• False

True or False: The sampling variability of a statistic is the distribution of values taken by the statistic in all possible samples of the same size from the same population.

• True

• False

A _________ is a number that describes some characteristic of a population.