NC Math 1 Statistics

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 data set?

• Choose the number closest to zero

• Select the highest number in the data set

• Add all numbers and divide by the total count

• Arrange numbers in ascending order, find the middle number or average of two middle numbers.

What is the mode of a data set?

• The mode is the highest value in the data set

• The mode is the lowest value in the data set

• The mode is the average of the data set

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

Define the range in statistics.

• The range is the average of all values in a dataset

• The range is the sum of all values in a dataset

• The range in statistics is the difference between the largest and smallest values in a dataset.

• The range is the mode of all values in a dataset

How is the interquartile range calculated?

• Q3 * Q1

• Q3 / Q1

• Q3 - Q1

• Q1 + Q3

Explain the concept of standard deviation.

• Standard deviation is a measure of the number of data points in a dataset

• Standard deviation is a measure of central tendency

• Standard deviation is a measure of the highest value in a dataset

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

Calculate the mean of the following numbers: 5, 8, 12, 15, 20

• 18

• 10

• 25

• 12

Find the median of the following data set: 10, 15, 20, 25, 30

• 15

• 25

• 35

• 20

Identify the mode in the data set: 5, 7, 7, 10, 12

• 5

• 7

• 10

• 12

Determine the standard deviation of the numbers: 2, 4, 4, 4, 5, 5, 7, 9

• 3

• 6

• 8

• 2