Does Sesame Street help economically disadvantaged children 'catch-up' with economically advantaged children? In the early 1970s, researchers at Educational Testing Service (the company that runs the SAT) ran a study to evaluate Sesame Street. The researchers sampled children representative of economically advantaged and disadvantaged populations from five different sites in the United States. To ensure the study contained a group of children that watched Sesame Street regularly, they randomly assigned children either to receive encouragement to watch Sesame Street or not to receive encouragement. Those assigned to encouragement were given promotional materials and received weekly visits and phone calls from ETS staff. Those assigned not to receive encouragement did not get this attention. The children were tested on a variety of cognitive variables, including knowledge of body parts, knowledge about letters, knowledge about numbers, etc., both before and after viewing the series.

Using the 'Sesame Street' data set described above, determine if there is more improvement for number recognition in boys than girls. Use the significance level of 5%.

1. Referring to the prompt above, what is the observational unit?

A) Economically Disadvantaged Children

B) Improvement in Number Recognition

C) Sesame Street

D) Children in the U.S.

2. Referring to the prompt above, identify the response variable.

A) Economically Disadvantaged Children

B) Improvement in Number Recognition

C) Sesame Street

D) Children in the U.S. 3. Referring to the prompt above state the null and alternative hypotheses.

A) Ho: p1 > p2; Ha: p1 < p2

B) Ho: p = po; Ha: p>po

C) Ho: p1 = p2; Ha: p1 < p2

D) Ho: p1 > p2; Ha: p1 = p2 4.Referring to the prompt above, check the requirements are met.

A) Yes, n1p1 > 10 and n1(1-p1) > 10 and n2p2 > 10 and n2(1-p2) > 10

B) Yes, n> 30

C) Yes, np > 10 and n(1-p) > 10

D) No, n1p1 < 10 and n1(1-p1) < 10 and n2p2 < 10 and n2(1-p2) < 10 5. Referring to the prompt above, what is the name of the test used?

A) One proportion hypothesis test

B) Two proportion hypothesis test

C) One proportion confidence interval

D) Two proportion confidence interval 6. Referring to the prompt above, what is the p-value?

A) p< 0.001

B) p = 0.5506

C) p = 0.607

D) p = 0.393 7. Referring to the prompt above, what decision should be made?

A) Accept Ho

B) Fail to reject Ho

C) Fail to reject Ha

D) Reject Ha

8. Referring to the prompt above, interpret the conclusion in non-technical terms.

A) There is enough evidence to support more boys than girls improved in number recognition by watching Sesame Street.

B) There is not enough evidence to support more boys than girls improved in number recognition by watching Sesame Street.

C) There is enough evidence to support the same proportion of boys and girls improved in number recognition by watching Sesame Street.

D) There is not enough evidence to support the same proportion of boys and girls improved in number recognition by watching Sesame Street