Module 01: Knowledge Check
In this situation, what is the sample? A study of 1,240 adults ages 18 to 35 showed that 77% go to the gym two or more times a week.
1,240 adults studied
A random sample of 845 teenagers that 35% smoked two or more cigarettes a day. The margin of error on this sample is 4%. What is the confidence interval?
31% - 39%
In this situation, what is the sample statistic? A Gallup poll asked 632 randomly selected adults if they approved of the death penalty. 59% said yes.
59% that said yes.
In this situation, what is the sample? A Gallup poll asked 632 randomly selected adults if they approved of the death penalty. 59% said yes.
632 randomly asked adults
A random sample of 75 third graders showed that 80% watch cartoons after school. The margin of error on this sample is 11%. What is the confidence interval?
69% - 91%
In this situation, what is the sample statistic? A study of 1,240 adults ages 18 to 35 showed that 77% go to the gym two or more times a week.
77% that go to the gym
In this situation, what is the population? A Gallup poll asked 632 randomly selected adults if they approved of the death penalty. 59% said yes.
All adults
In this situation, what is the population? A study of 1,240 adults ages 18 to 35 showed that 77% go to the gym two or more times a week.
All adults ages 18 to 35
What type of study is this? Some reactive dogs were given Rescue Remedy drops to determine if the drops would calm dog behavior. Other reactive dogs were not given the drops.
Experiment
What type of study is this? To test the effect of a new treatment for heart disease, 200 men were given the new treatment while 200 other men were given a placebo.
Experiment
What type of study is this? A study of 2,500 fatal car crashes identified those that involved drivers who were texting and those who were not.
Observational study
What type of study is this? An electronics company selects a simple random sample of batteries and tests their voltage.
Observational study
What type of study is this? In an online survey, 74% of respondents said that they read more news online than they do in print.
Observational study