AA C&C Final Review: Units 1 & 2 '24

Front

What is variance in statistics?

Back

Variance is a measure of how much values in a data set differ from the mean. It is calculated as the average of the squared differences from the mean.

Front

How do you calculate the variance of a data set?

Back

To calculate variance, find the mean of the data set, subtract the mean from each data point, square the result, and then average those squared differences.

Front

What is the formula for variance?

Back

Front

What does it mean for a population to decrease by a percentage?

Back

A population decreasing by a percentage means that each year, a certain percentage of the population is lost. For example, an 8% decrease means that 8% of the population is removed each year.

Front

How do you calculate the future population after a percentage decrease?

Back

Front

What is an exponential decay function?

Back

Front

What is the significance of the average and standard deviation in a normal distribution?

Back

In a normal distribution, the average (mean) indicates the center of the data, while the standard deviation measures the spread or dispersion of the data around the mean.

Front

What is the empirical rule in statistics?

Back

The empirical rule states that for a normal distribution, approximately 68% of data falls within one standard deviation of the mean, 95% within two, and 99.7% within three.

Front

How do you find the probability of a range in a normal distribution?

Back

To find the probability of a range in a normal distribution, calculate the z-scores for the endpoints of the range and use the standard normal distribution table to find the corresponding probabilities.

Front

What is compound interest?

Back

Compound interest is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods.