Unit 2.4 test review P1

Front

What is the formula to calculate the average of a set of grades?

Back

Average = (Sum of all grades) / (Number of grades)

Front

If Jeff's grades are 100, 96, 96, and 100, what is his average grade?

Back

98

Front

What percentage of data falls within one standard deviation of the mean in a normal distribution?

Back

Approximately 68%.

Front

In a normal distribution, what is the relationship between the mean and the median?

Back

The mean is equal to the median.

Front

What is standard deviation?

Back

A measure of the amount of variation or dispersion in a set of values.

Front

How do you determine which data set has the largest standard deviation?

Back

Calculate the standard deviation for each data set and compare the values.

Front

What are the characteristics of a normal distribution?

Back

Symmetrical, bell-shaped, and continuous.

Front

What does it mean if a distribution is described as 'random'?

Back

It means that the values occur in no particular order or pattern.

Front

What is the significance of the area under the curve in a normal distribution?

Back

It represents the total probability, which equals 1.

Front

What is the empirical rule in statistics?

Back

It states that for a normal distribution, approximately 68% of data falls within one standard deviation, 95% within two, and 99.7% within three.