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Statistics and probability

Course: Statistics and probability > Unit 6

Lesson 2: Sampling and observational studies

Reasonable samples
Valid claims
Making inferences from random samples
Identifying a sample and population
Identify the population and sample
Examples of bias in surveys
Example of undercoverage introducing bias
Correlation and causality
Identifying bias in samples and surveys
Simulation and randomness: Random digit tables

Valid claims

Tasty Treats Baking Company asked a random sample of 100 students in the senior class at Ridgemont High School the question, “Do you prefer chocolate or butterscotch Tasty Treats?” Everyone surveyed had to pick one of the two answers, and 42, percent said they preferred chocolate.

Based on this data, which of the following conclusions are valid?

(Choice A)
About 42, percent of all students at Ridgemont High prefer chocolate.
(Choice B)
About 42, percent of all students in the senior class at Ridgemont High prefer chocolate.
(Choice C)
42, percent of this sample preferred chocolate, but we cannot conclude anything about the population.

Stuck?

Statistics and probability

Course: Statistics and probability > Unit 6

Problem