AP Stat Ch. 15 & 16 Review

Front

What is the probability of getting 5 or more haunted houses in a neighborhood of 40 houses if 15% are haunted?

Back

0.74

Front

What is the mean time to make and bake a cake if mixing takes 14 minutes (sd = 2.5) and baking takes 35 minutes (sd = 6.2)?

Back

Mean = 49 min, SD = 6.685 min

Front

What is the probability of getting at least 1 correct answer when randomly guessing on 5 multiple choice questions with 4 choices each?

Back

0.7627

Front

What is the standard deviation of the difference in hourly salaries between a high school graduate ($13.50, sd = $5.75) and an Associate's degree holder ($19.75, sd = $9.25)?

Back

$10.89

Front

What is the z-score for a player who runs a 40-yard sprint in 5.6 seconds if the mean is 5.2 seconds (sd = 0.3)?

Back

1.33

Front

Define 'mean' in statistics.

Back

The mean is the average of a set of numbers, 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 normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Front

Explain the concept of a z-score.

Back

A z-score indicates how many standard deviations an element is from the mean of the dataset.

Front

What does it mean to have a probability of 0.74?

Back

It means there is a 74% chance of the event occurring.