Sampling Means and Proportions

Select the correct description

• Population Mean

• Averages

• Mean of the Sampling Distribution of X-bar

• Sample Mean

Select the correct description

• Mean of the Sampling Distribution of p-hat

• Population Mean

• Percents of Means

• Proportions

What does this formula do?

• Calculates Standard Deviation for Sampling Dist. of Sample Means

• Checks if the samples are independent

• Checks Normality

• Calculates Standard Deviation for Sampling Dist. of Sample Proportions

Which best describes the sampling distribution shown below.

• Unbiased Estimator

• Biased Estimator

Which best describes the sampling distribution shown below.

• Unbiased Estimator

• Biased Estimator

• Population Mean

• Mean of the Sampling Distribution of X-bar

• Sample Mean

• Proportion

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

A sample is taken of 200 people. The number of people who own a dog was 80.
What is the sample proportion?

• 80

• 0.8

• 0.4

• 35%

30% of all dogs in a city are micro-chipped. In a sample of 500 dogs, what is the probability that less than 140 dogs are micro-chipped? Select the closest option.

• 0.25

• 0.21

• 0.17

• 0.13

Suppose we have a population that is 49% male.  If we take a random sample from that population and determine the percent of our sample that is male, we refer to this proportion as...

• p

• p-hat
  

• the sample mean

• the sampling distribution