AP Stats Unit 5 Review

Front

What is the mean of the sampling distribution of p-hat when the true proportion is 40%?

Back

0.4

Front

What does the symbol 'σ' represent in statistics?

Back

The standard deviation of the population.

Front

What is the standard deviation of the sampling distribution of p-hat?

Back

It is calculated as √(p(1-p)/n), where p is the population proportion and n is the sample size.

Front

What is the Central Limit Theorem?

Back

It states that the sampling distribution of the sample mean will be approximately normally distributed if the sample size is sufficiently large.

Front

What is the probability that the mean weight of 25 randomly selected unicorns is greater than 1010 pounds if the mean is 1000 lbs and standard deviation is 25 lbs?

Back

2.28%

Front

What is the difference between a population and a sample?

Back

A population includes all members of a specified group, while a sample is a subset of the population.

Front

What is a sampling distribution?

Back

The distribution of values taken by a statistic in all possible samples of the same sample size from the same population.

Front

What does 'p-hat' represent in statistics?

Back

It represents the sample proportion.

Front

What is the formula for calculating the standard error of the mean?

Back

Standard Error = σ/√n, where σ is the population standard deviation and n is the sample size.

Front

What is the significance of a 95% confidence interval?

Back

It means that if we were to take many samples and build a confidence interval from each, approximately 95% of those intervals would contain the true population parameter.