Statistics Center/Spread and Standard Deviation

The total number of data values in this histogram is...

• 11

• 7

• 4

• 15

• 25

True of false, 75% of the data values are greater than 18?

• True

• False, 75% of the values are greater than 16

• False, 50 % of the values are greater than 18

• False, 25% of the values are greater than 18

What does the median represent in a dataset?

• The average value of the dataset

• The middle value when the data is in order from least to greatest

• The most frequently occurring value in the dataset

• The difference between the highest and lowest values in the dataset

How is the mean calculated?

• By multiplying all the numbers and taking the square root

• By adding all the numbers and dividing by the number of data points

• By subtracting the smallest number from the largest number

• By finding the data point that occurs the most

What does MAD stand for in statistics?

• Mean Absolute Distance

• Median Absolute Deviation

• Mean Absolute Deviation

• Maximum Allowed Difference

Which of the following is a measure of spread?

• Mean

• Median

• Range

• Mode

What does a box plot, also known as a box and whiskers plot, consist of?

• Mean, median, mode, and range

• Minimum, Q1, median, Q3, and maximum

• Standard deviation, variance, mean, and expected value

• Frequency, relative frequency, cumulative frequency, and percentage

How is the median found in a data set?

• By finding the data point that occurs the most

• By averaging the two middle numbers in an ordered set

• By selecting the middle number in an ordered set

• By subtracting the smallest value from the largest value

What is the mode in a data set?

• The average of all data points

• The middle value of the data set

• The value that occurs most frequently

• The difference between the highest and lowest values

Which of the following is not a measure of center?

• Mean

• Median

• Mode

• Range