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Type I and Type II Errors

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Wize University Statistics Textbook > Hypothesis Testing with One Sample

Type I and Type II Errors

6 Activities

Consider the following null and alternative hypotheses:
H0: coffee doesn't help suppress appetite
H1: coffee helps suppress appetite

a) What are the consequences of committing a type I error?

1. You conclude that coffee helps suppress appetite but it doesn’t
2. You conclude that coffee doesn’t help suppress appetite but it actually does

b) What are the consequences of committing a type II error?

1. You conclude that coffee helps suppress appetite but it doesn’t
2. You conclude that coffee doesn’t help suppress appetite but it actually does

c) To increase the power of this test, the researcher should increase/decrease his sample size

d) As the probability of type I error increases the probability of type II error increases/decreases/doesn’t change
More Type I and Type II Errors Questions:
Type I and II Errors
When we reject the null hypothesis we are
Type I and II Errors
The power of a hypothesis test is
Type I and II Errors
Jimmy wants to sell his home. The null hypothesis is that by renovating his house he will not get more than 12 bids. Which of the following is true?
Type I and Type II Errors
Consider the following null and alternative hypotheses.
Ho: coffee doesn't help suppress appetite
Ha; coffee helps suppress appetite
Type I and Type II Errors
Campers contemplate whether the water at a nearby lake is safe for consumption or not.
Select the correct hypotheses.
(a)
Type I and Type II Errors
Mega Corp’s reduction in production costs is thanks to years of research and development. They boast on Forbes Magazine that this is why their prices now are lower.
Select the correct hypotheses.
(a)
Type I and Type II Errors
Brenda concludes that hiring greeters at her store increased sales, but in fact it didn't. This is an example of:
Type I and Type II Errors
The power of a hypothesis test is
Type I and Type II Errors
Jimmy wants to sell his home. The null hypothesis is that by renovating his house he will not get more than 12 bids. Which of the following is true?
Type I and II Errors
The mayor believes that the crime rate has stayed the same but in fact it is much worse.
Determine if a Type I Error, Type II Error, or correct decision has been made.
Type I and II Errors
Carbo Max determined that they developed a pill that allows people to eat carbs and not gain weight. However, people who tried it actually gained weight. Lawsuits ensued.
Determine if a Type I Error, Type II Error, or correct decision has been made.
Statistical Errors
What is the power of a hypothesis test?
Statistics: Definitions
One of the following statements is false. Which one is it?
Statistical errors
For the following statements, select true or false. Enter T for True, F for False. (Use capital letters: T, F)
1. The mean weight of five cats is 20 lbs. We take away one that at weights 28 lbs. The mean weight of the remaining cats is 18 lbs.
T
2. The 95% confidence interval is [$800, $1,200]. The sample mean must be $1,000.
T