Hypothesis Testing - 2

In a random sample of 1000 adult Americans, 700 indicated that they oppose the reinstatement of a military draft. Is there convincing evidence that the proportion of American adults who oppose the reinstatement of the draft is different from two-thirds? State the null hypothesis.

• H_o: p < 2/3, where p is the true proportion of American adults who oppose the reinstatement of the draft.

• H_o: p > 2/3, where p is the true proportion of American adults who oppose the reinstatement of the draft.

• H_o: p = 2/3, where p is the true proportion of American adults who oppose the reinstatement of the draft.

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 null hypothesis.

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

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

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

Suppose the P-value for a hypothesis test is 0.0304. What is the appropriate conclusion?

• a) Reject the null hypothesis

• b) Reject the alternative hypothesis

• c) Fail to reject the null hypothesis

• d) Fail to reject the alternative hypothesis

The weight of the average 6th grade student's backpack (with books in it) is 18.4 lbs. The principal of the school thinks that the backpack does not weight 18.4 lbs. What is the null and alternate hypothesis? 

• H₀ = 18.4
  H_a = 18.4
• H₀ = 18.4
  H_a > 18.4
• H₀ = 18.4
  H_a < 18.4
• H₀ = 18.4
  H_a ≠ 18.4

In a survey of 526 US businesses, 400 indicated that they monitor employee's web site visits. Is there sufficient evidence that more than 70% of US businesses monitor employees' web site visits? State the null hypothesis.

• H_o: p = .70, where p is the true proportion of US businesses that indicated they monitor employee web sites.

• H_o: p < .70, where p is the true proportion of US businesses that indicated they monitor employee web sites.

• H_o: p > .70, where p is the true proportion of US businesses that indicated they monitor employee web sites.

Which of the following is the FIRST step of a hypothesis test?

• Check assumptions & conditions
• Find your test statistic
• State your conclusion
• State your null & alternative hypotheses

What is the only option for the null hypothesis? 

• H₀ = k
• H₀ > k
• H₀ < k
• H₀ ≠ k

When p-value is greater than alpha we:

• Reject Ho

• Fail to reject Ha

• Fail to reject Ho

• Reject Ha

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

• True
• False

When p-value is greater than alpha we:

• Reject Ho

• Fail to reject Ha

• Fail to reject Ho

• Reject Ha