STATS Review

We conclude "Fail to reject H₀". What could we use as our interpretation?

• The proportion of babies born male is not 0.50.
• There is not enough evidence to say that the proportion of babies born male is different from 0.50.
• There is not enough evidence to say that the proportion of babies born male is 0.50.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

In a random sample of 1000 adult Americans, only 430 could name at least one justice who is currently serving on the US Supreme Court. A claim is that fewer than half of adult Americans can name at least one justice who is currently serving on the US Supreme Court. State the null hypothesis.

• H_o: p <.5, where p is the true proportion of Americans who can name one justice currently serving.

• H_o:p >.5 where p is the true proportion of Americans who can name one justice currently serving.

• H_o:p =.5 where p is the true proportion of Americans who can name one justice currently serving.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

In a random sample of 1000 adult Americans, only 430 could name at least one justice who is currently serving on the US Supreme Court. A claim is that fewer than half of adult Americans can name at least one justice who is currently serving on the US Supreme Court. State the alternative hypothesis.

• H_a: p=.5, where p is the true proportion of Americans who can name one justice currently serving.

• H_a: p>.5, where p is the true proportion of Americans who can name one justice currently serving.

• H_a: p<.5, where p is the true proportion of Americans who can name one justice currently serving.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

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.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

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.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

The Associated Press found that 730 of 1000 randomly selected adults preferred to watch movies at home rather than at a movie theater. Is there convincing evidence that the majority of adult Americans prefer watching movies at home? State the alternative hypothesis.

• H_a: p = .50, where p is the true proportion of adult Americans who prefer watching movies at home.

• H_a: p < .50, where p is the true proportion of adult Americans who prefer watching movies at home.

• H_a: p > .50, where p is the true proportion of adult Americans who prefer watching movies at home.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

The Associated Press found that 730 of 1000 randomly selected adults preferred to watch movies at home rather than at a movie theater. Is there convincing evidence that the majority of adult Americans prefer watching movies at home? State the null hypothesis.

• H_o: p = .50, where p is the true proportion of adult Americans who prefer watching movies at home.

• H_o: p > .50, where p is the true proportion of adult Americans who prefer watching movies at home.

• H_o: p < .50, where p is the true proportion of adult Americans who prefer watching movies at home.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.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.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

CCSS.HSS.ID.B.5

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 alternative hypothesis.

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

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

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

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

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.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4