Sampling Proportions and Means

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

Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.
This is a form of:

• Simple Random Sample

• Stratified Random Sample

• Voluntary Response

• Systematic Random Sampling

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

What does this symbol represent?

• standard error

• standard deviation of the sample proportions

• standard deviation of a parameter

• standard deviation of the population

What does this formula do?

• Calculates Standard Deviation

• Checks if the samples are independent

• Checks Normality

• Calculates Probabilities

Sigma of P-Hat

• Population Standard Deviation

• Standard Deviation of the Sampling Distribution of Sample Means

• Sample Percents of the Standard Deviation

• Standard Deviation of the Sampling Distribution of Sample Proportions

• Population Mean

• Mean of the Sampling Distribution of X-bar

• Sample Mean

• Proportion

Select the correct description

• Standard Deviation of the Sampling Distribution of Sample Means

• Standard Deviation

• Population Standard Deviation

• Sample Standard Deviation

Select the correct description

• Population Mean

• Proportion

• Sample Mean

• Population Median