Spiral review #5

Front

What percent of a group is male if 60% are male?

Back

60% of the group is male.

Front

What is the formula to find the value of x using Z-scores?

Back

x = (Z-score * Standard Deviation) + Mean.

Front

If the Z-score is -2.2, mean is 25, and standard deviation is 7, what is x?

Back

x = (-2.2 * 7) + 25 = 9.6.

Front

What is the mode of a set of numbers?

Back

The mode is the number that appears most frequently in a data set.

Front

Given the scores 24, 14, 34, 30, what is the mode?

Back

The mode is 24.

Front

What is the 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

If the Z-score is -1.25, standard deviation is 4, and x is 11, what is the mean?

Back

Mean = x - (Z-score * Standard Deviation) = 11 - (-1.25 * 4) = 16.

Front

What percent of data lies within 1 standard deviation from the mean in a normal distribution?

Back

Approximately 68% of data lies within 1 standard deviation from the mean.

Front

What is a standard deviation?

Back

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

Front

How do you calculate the mean of a data set?

Back

Add all the numbers together and divide by the count of numbers.