End-of-Unit Assessment (A) - Grade 8 Review

Noah gathered data at his school among 7th and 8th graders to see if there was an association between grade level and handedness. The table and graph show his data, but the number of right-handed 8th graders is missing. Which of these could be the number of right-handed 8th graders?

• 33

• 85

• 107

• 157

Select all the relationships that demonstrate a positive association between variables.

• Outside temperature and cost to heat a home

• Length of time walked and distance traveled

• Pounds of cherries bought and amount of money spent on cherries

• Speed of a train and the amount of time it takes for the train to get to its destination

• Number of people in a grocery check-out line and amount of time waiting in line

In the two-way table, what is the total number of 8th graders surveyed?

• 68

• 107

• 175

• 243

In the two-way table, what is the total number of students surveyed?

• 243

• 325

• 150

• 175

Fill in the blank: A scatter plot with a negative association that is not linear is an example of a _________.

• A) Positive linear association

• B) Negative linear association

• C) No association

• D) Non-linear association

What is the total number of adults who chose a sweet snack?

• 57

• 88

• 77

• 31

Fill in the blank: The total number of children who attended the social is ____.

• A) 145

• B) 108

• C) 253

• D) 119

What is the total number of salty snacks chosen?

• 134

• 119

• 145

• 108

What is the relative frequency of sweet snacks chosen by adults?

• 0.39

• 0.61

• 0.50

• 0.44

Fill in the blank: The relative frequency of sweet snacks chosen by children is ____.

• 0.71

• 0.29

• 0.50

• 0.44