Normal Curve

Front

What is the standard deviation in a normal distribution?

Back

The standard deviation is a measure of the amount of variation or dispersion in a set of values. In this case, it is 30.

Front

Which of the following is NOT a characteristic of normal distribution?

Back

Random.

Front

In a normal distribution, what percent of the data falls within one standard deviation from the mean?

Back

68%.

Front

In a normal distribution, what percent of the data falls within two standard deviations from the mean?

Back

95%.

Front

In a normal distribution, what percent of the data falls within three standard deviations from the mean?

Back

99.7%.

Front

What shape does a normal curve have?

Back

Symmetrical.

Front

What is the empirical rule in relation to normal distribution?

Back

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

Front

What does it mean for a distribution to be bell-shaped?

Back

A bell-shaped distribution indicates that most of the data points are concentrated around the mean, with fewer data points as you move away from the mean.

Front

What is a characteristic of a symmetrical distribution?

Back

In a symmetrical distribution, the left and right sides of the distribution are mirror images of each other.

Front

What is the mean in a normal distribution?

Back

The mean is the average of all data points and is located at the center of the normal curve.