Making Statistical Inferences

Identify the median of the following set of numbers: 8, 12, 16, 20, 24, 28

• 20

• 12

• 24

• 16

Recognize the mode in the following set of numbers: 8, 12, 12, 16, 20, 20, 20, 24, 28

• 24

• 12

• 20

• 16

Identify the mode in the following set of numbers: 5, 10, 10, 15, 20, 20, 20, 25, 30

• 20

• 30

• 25

• 15

Calculate the median of the following numbers: 8, 12, 16, 20, 24, 28

• 20

• 12

• 24

• 16

What is the purpose of statistics in data analysis?

• To create random patterns and trends

• To make the data look more complicated than it is

• To summarize and interpret data, make inferences, and identify patterns and trends.

• To confuse and mislead analysts

Marvin's grades currently in math are 100, 97, 98, 74, and 85. Gavin's grades currently in math are 98, 100, 88, 91, and 65. Find the range of each student's scores and make an inference about their ranges.

Ten fourth-grade girls and ten seventh-grade girls were randomly selected. Their heights, in inches, are recorded below. 4th Grade 56, 47, 54, 51, 53, 58, 48, 54, 46, 53 7th Grade 57, 58, 60, 64, 62, 52, 57, 60, 65, 55 Find the range of both classes heights' and make an inference about them.

Four fourth-grade girls and four seventh-grade girls were randomly selected. Their heights, in inches, are recorded below. 4th Grade 56, 47, 54, 51 7th Grade 57, 58, 60, 64 Find the range for both classes and make an inference about the range of scores.

Four fourth-grade girls and four seventh-grade girls were randomly selected. Their heights, in inches, are recorded below.

4th Grade

56, 47, 54, 51

7th Grade

57, 58, 60, 64

What is the mean for 7th grade?

• 59.75

• 58

• 60

• 52

Four fourth-grade girls and four seventh-grade girls were randomly selected. Their heights, in inches, are recorded below.

4th Grade

56, 47, 54, 51

7th Grade

57, 58, 60, 64

Which grade has the highest mean?

• 4th Grade

• 7th Grade