Statistics Review

Front

What shape is a normal distribution curve?

Back

Bell curve

Front

What is the probability of choosing blue from 5 green, 6 yellow, 8 blue, and 7 brown?

Back

4/13

Front

What is the area under the curve to the left of z = 0.55?

Back

.7088

Front

According to the empirical rule, what percentage of data falls within 1 standard deviation?

Back

68%

Front

What is the probability of spinning an even number on a spinner with regions marked 10, 20, 30, 40, 50, 60, 70, 80?

Back

1

Front

Define a normal distribution.

Back

A probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

What is the empirical rule in statistics?

Back

It states that for a normal distribution, approximately 68% of the data falls within one standard deviation of the mean.

Front

What does a z-score represent?

Back

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

Front

What is the formula for calculating probability?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes)

Front

What is a sample in statistics?

Back

A subset of a population used to represent the entire group.