Chapter 3-Descriptive Statistics: Measurement Chapter Exam

Front

What is the mean of a set of numbers?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

How do you find the value of Y if the mean of X, Y, and Z is known?

Back

To find Y, use the formula: Mean = (X + Y + Z) / 3. Rearranging gives Y = (Mean * 3) - X - Z.

Front

What does it mean to be in the 25th percentile?

Back

Being in the 25th percentile means that 25% of the data points are below your score.

Front

How do you calculate the interquartile range (IQR)?

Back

IQR = Q3 - Q1, where Q3 is the third quartile and Q1 is the first quartile.

Front

What is the median of a data set?

Back

The median is the middle value when the data set is ordered from least to greatest.

Front

What is the mode of a data set?

Back

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

Front

What is central tendency?

Back

Central tendency refers to the measure that represents the center or typical value of a data set, commonly measured by mean, median, and mode.

Front

What is the formula for the IF function in Excel?

Back

=IF(logical_test, value_if_true, value_if_false) is the correct formula for the IF function.

Front

How do you find the range of a data set?

Back

Range = Maximum value - Minimum value.

Front

What is a quartile?

Back

A quartile is a type of quantile that divides a data set into four equal parts.