6-2 Additional Vocabulary Support

Use the words in the list to complete the sentences below. (inference, invalid, valid) 1. A(n) __________ is a judgment made by interpreting data.

• inference

• conclusion

• assumption

• prediction

Tags

CCSS.L.6.6

CCSS.L.7.6

CCSS.L.8.6

CCSS.W.6.2D

CCSS.W.7.2D

An inference that is based on a representative sample is __________.

• valid

• biased

• random

• invalid

Tags

CCSS.L.6.6

CCSS.L.7.6

CCSS.W.6.2D

CCSS.W.7.2D

CCSS.W.8.2D

An inference that does not represent the population is __________.

• invalid

• accurate

• representative

• reliable

Tags

CCSS.L.7.6

CCSS.L.8.6

CCSS.W.6.2D

CCSS.W.7.2D

CCSS.W.8.2D

For each situation write valid or invalid. Sample: 10 randomly selected shoppers at a vitamin store are surveyed. Survey Results: 3 shoppers need potassium supplements. Inference: About 30% of all people need potassium supplements. Is this inference valid or invalid?

• valid

• invalid

For each situation write valid or invalid. Sample: 50 randomly selected seventh-grade students at East Middle School are surveyed. Survey Results: 5 students wear glasses. Inference: About 10% of all seventh-grade students at East Middle School wear glasses. Is this inference valid or invalid?

• valid

• invalid

For each situation write valid or invalid. Sample: 5 randomly selected students in a homeroom try to wiggle their ears. Survey Results: 2 students in the sample can wiggle their ears. Inference: About 40% of the students in the homeroom can wiggle their ears. Is this inference valid or invalid?

• valid

• invalid

Tags

CCSS.HSS.IC.B.3

For each situation write valid or invalid. Sample: 20 randomly selected cell phones from one shipment are tested. Survey Results: 1 cell phone in the sample is defective. Inference: About 5% of all cell phones are defective. Is this inference valid or invalid?

• valid

• invalid