Statistics Hypothesis Testing

A __________ occurs if you reject the null hypothesis when it is true.

• Type I error

• Type II error

In a national survey of 2013 adults, 1283 indicated that they believe rudeness is a more serious problem than in years past. Does this indicate that more than 3/4 of American adults believe rudeness is a worsening problem? State the alternative hypothesis.

• H_a: p > .75, where p is the true proportion of Americans who believe rudeness is worsening.

• H_a: p = .75, where p is the true proportion of Americans who believe rudeness is worsening.

• H_a: p <.75, where p is the true proportion of Americans who believe rudeness is worsening.

In a hypothesis test, the alternative hypothesis is always a statement of equality. 

• True

• False

Is a statement about the parameters of a model

• A statistical hypothesis

• Confidence Intervals

• Normal distribution

• Experimental design

Which test hypothesis states that there is no difference between two parameters?

• Null hypothesis

• Point hypothesis

• Significance hypothesis

• Alternative hypothesis

The (a)   separates the critical region from the non-critical region.

Mark all that apply

• this has a significance level of 0.09

• this has a significance level of 0.18

• this is two tail test

• the confidence level is 18%

If you wish to test the claim that the mean of the population is 100, the appropriate alternate hypothesis is

It is also referred to as a probability of committing an incorrect decision about the null hypothesis.

• level of error

• level of statistic

• level of acceptance

• level of significance

Which of the following describes a null hypothesis using two-tailed test?

• 𝐻₀: 𝜇 = 𝜇₀

• 𝐻₀: 𝜇 ≠ 𝜇₀

• 𝐻₀: 𝜇 ≥ 𝜇₀

• 𝜇 ≤ 𝜇₀