Statistics Basics

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

• Mean = (Sum of all numbers) - (Total count of numbers)

• Mean = (Sum of all numbers) / (Total count of numbers)

• Mean = (Sum of all numbers) + (Total count of numbers)

• Mean = (Sum of all numbers) * (Total count of numbers)

How do you find the median of a dataset?

• Arrange numbers in ascending order, find the middle number for odd datasets, or average the two middle numbers for even datasets.

• Add all numbers together and divide by the total count

• Choose the number closest to zero

• Select the highest number in the dataset

In a dataset, what is the mode?

• The mode is the average of all values in a dataset.

• The mode is the value that is closest to zero in a dataset.

• The mode is the value that appears most frequently in a dataset.

• The mode is the value that is the sum of all values in a dataset.

Calculate the mean of the numbers: 5, 10, 15

• 5

• 10

• 15

• 20

Find the median of the following data set: 10, 4, 8, 6, 2

• 6

• 4

• 12

• 7

Identify the mode in the dataset: 3, 5, 5, 7, 9

• 7

• 3

• 5

• 9

When is the mode useful in data analysis?

• The mode is useful in data analysis when you want to find the least occurring value in a dataset.

• The mode is useful in data analysis when you want to find the range of values in a dataset.

• The mode is useful in data analysis when you want to find the most frequently occurring value or values in a dataset.

• The mode is useful in data analysis when you want to find the average value in a dataset.

Calculate the mean of the numbers: 12, 3, 5, 10, 5

• 5

• 7

• 9

• 11

Find the median of the following data set: 3, 3, 3, 6, 9

• 5

• 3

• 7

• 4

Identify the mode in the dataset: 2, 4, 4, 6, 6

• 5

• 2

• 3

• 4, 6