Central Tendency Review

When you are trying to find the MEDIAN of a set of data and 2 numbers are left in the middle after putting them in order from least to greatest, what do you do?

• List both of the numbers as the Median.

• Add the two numbers together and divide by 2.

• Pick the one that you want.

• Subtract the two numbers.

The number of miles that Jenna cycled each week for a 7-week period is shown:

36, 42, 28, 52, 48, 36, 31

What is the median number of miles Jenna cycled?

• 24

• 39

• 36

• 52

6. Find the mean.
18, 2, 0, 0, 0

• 4

• 5

• 10

• 20

Find the median.
7, 1, 1, 7, 1, 4, 1

• 4

• 7

• 1

• 5

Find the mode.
7, 1, 1, 7, 1, 4, 1

• 7

• 3

• 1

• 4

How do outliers affect the measures of central tendency in a data set?

• Outliers can distort the mean and median, making them less representative of the central tendency of the data set.

• Outliers have no impact on measures of central tendency

• Outliers increase the accuracy of the mean and median

• Outliers always perfectly represent the central tendency of the data set

Answer explanation

Outliers can distort the mean and median, making them less representative of the central tendency of the data set.

In a classroom, what does the term 'mean' score of a test refer to?

• The score in the middle when all scores are ordered

• The score that appears most frequently

• The sum of all scores divided by the number of students

• The difference between the highest and lowest scores

Answer explanation

The term 'mean' score of a test refers to the sum of all scores divided by the number of students, making it the correct choice.

What is the formula to calculate the mean of a set of numbers?

• Sum of all numbers * Total count of numbers

• Sum of all numbers - Total count of numbers

• Total count of numbers / Sum of all numbers

• Sum of all numbers / Total count of numbers

Answer explanation

The correct formula to calculate the mean of a set of numbers is to divide the sum of all numbers by the total count of numbers.

If a data set has an even number of values, how is the median calculated?

• Choose the lowest value as the median.

• Add all values and divide by the total count.

• Take the average of the two middle values.

• Select the highest value as the median.

Answer explanation

The correct way to calculate the median of a data set with an even number of values is to arrange all the values in order and then take the average of the two middle values.

What is the value that appears most frequently in a data set known as?

• mode

• mean

• average

• median

Answer explanation

The value that appears most frequently in a data set is known as the mode. It is the correct answer choice in this case.