AP Statistics Midterm Review

Front

What percentage of SUVs are driven by women?

Back

86.5% of SUVs are driven by women.

Front

What does the percentile represent?

Back

The percentile represents the percent of data values that are below.

Front

Calculate the mean and standard deviation of time for a two-song sequence given: Mean length of songs = 4.3 min, SD = 1.2 min; Silence = 0.2 min, SD = 0.1 min.

Back

Mean = 8.8 min.; SD = 1.7

Front

Use the data to calculate the prediction line: y = 27.31 + 4.54x. Predict the number of prom tickets sold on day 6.

Back

Prom tickets are estimated to be about 54.55.

Front

What is the probability that a randomly picked person who speaks German is a boy?

Back

The probability is 0.7273.

Front

Define 'mean' in statistics.

Back

The mean is the average of a set of values, calculated by dividing the sum of all values by the number of values.

Front

Define 'standard deviation'.

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

What is a prediction line in statistics?

Back

A prediction line is a linear equation that models the relationship between two variables, allowing for predictions of one variable based on the other.

Front

Explain the concept of probability in statistics.

Back

Probability is the measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the difference between 'population' and 'sample' in statistics?

Back

A population includes all members of a defined group, while a sample is a subset of the population used for analysis.