Chapter 8.1 FLASHCARD

Front

What is the critical value for an α = 0.09 two-tailed test?

Back

±1.69

Front

What is a Type II error in hypothesis testing?

Back

A Type II error occurs when the null hypothesis is not rejected when it is false.

Front

What conclusion can be drawn if the null hypothesis H₀: μ = 73 is rejected in favor of H₁: μ > 73?

Back

The mean checkout amount is greater than $73.

Front

Is the statement H₀: = 8 a valid null hypothesis?

Back

No, there is no parameter contained in this statement.

Front

What are the null and alternative hypotheses for the conjecture 'The average weight of a cuckoo bird is less than 2.2 pounds'?

Back

H₀: The average weight of a cuckoo bird is equal to 2.2 pounds. H₁: The average weight of a cuckoo bird is less than 2.2 pounds.

Front

What does a null hypothesis represent in hypothesis testing?

Back

A null hypothesis represents a statement of no effect or no difference, serving as a baseline for comparison.

Front

What is the significance level (α) in hypothesis testing?

Back

The significance level (α) is the probability of rejecting the null hypothesis when it is true.

Front

What is a one-tailed test?

Back

A one-tailed test is a hypothesis test that evaluates the direction of the effect, either greater than or less than a certain value.

Front

What is a two-tailed test?

Back

A two-tailed test is a hypothesis test that evaluates whether a parameter is significantly different from a certain value in both directions.

Front

What does it mean to reject the null hypothesis?

Back

Rejecting the null hypothesis means there is sufficient evidence to support the alternative hypothesis.