Among college students, the proportion p who say they're interested in their congressional district's election results has traditionally been 65%. After a series of debates on campuses, a political scientist claims that the proportion of college students who say they're interested in their district's election results is more than 65%. A poll is commissioned, and 199 out of a random sample of 275 college students say they're interested in their district's election results. Is there enough evidence to support the political scientist's claim at the 0.01 level of significance?

The National Technology Readiness Survey sponsored by the Smith School of Business at the University of Maryland surveyed 418 randomly sampled Americans, asking them how often they delete spam emails. In 2004, 23% of the respondents said they delete their spam mail once a month or less, and in 2009 this value was 16%. a) What are the hypotheses for evaluating if the proportion of those who delete their email once a month or less has changed from 2004 to 2009? O Ho: P2009 = P2004 and HA:P2009 > P2004 Ho:P2009 P2004 and HA: P2009 # P2004 O Ho:P2009 P2004 and HA: P2009 < P2004 О Но:р — р2009 and HA:p — Р2004 b) What is the point estimate for the difference between the two population proportions?

A researcher claims that the percentage of voters that favor voting via absentee ballot is 35%.   Identify the alternative hypothesis Ha.

In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests." The article says that the overall statewide proportion of school buses that fail safety tests is 9%. However, one bus companyhas a higher rate of over 12%. Assume that we want a new estimate for the statewide proportion of school buses that fail the safety inspection. We take a sample of 200 buses and find that 20 buses fail the safety inspection. What is the sample proportion of buses that fail the test? (Enter your answer as a decimal fraction between 0 and 1, e.g. .27)

Among students at a nearby college, the proportion who say they're interested in their congressional district's election results has traditionally been 70%. After a series of lackluster debates on campus, a political scientist claims that the proportion, p, of students at the college who say they're interested in their district's election results is now less than 70%. A poll is commissioned, and 128 out of a random sample of 205 students at the college say they're interested in their district's election results. Is there enough evidence to support the political scientist's daim at the 0.05 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H.. Ho :0 合 H :0 (b) Determine the type of test statistic to use. (Choose one) ▼ D=0 OSO (c)…

Among college students, the proportion p who say they’re interested in their congressional district’s election results has traditionally been 75%. After a series of debates on campuses, a political scientist claims that the proportion of college students who say they’re interested in their district’s election results is more than 75%. A poll is commissioned, and 210 out of a random sample of 260 college students say they’re interested in their district’s election results. Is there enough evidence to support the political scientist's claim at the 0.10 level of significance?Perform a one-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) A. State the null hypothesis Hoand the alternative hypothesis H1 B. Find the critical value. (Round to three or more decimal places.) C. Is there enough evidence to support the political scientist's claim that the proportion of college students who…

A survey reported that 77% of registered voters in California approved of allowing two people of the same gender to marry and have regular marriage laws apply to them. Among 18 to 39-year-old registered voters in California, 92% approved of gay marriage. 34% of Californian registered voters are between the ages of 18 and 39. Out of the voters who approved of gay marriage, what is the percentage that are between the ages of 18- 39?

A survey asked 1578 US residents: “Do you think the use of marijuana should be made legal, or not?”. 61% of respondents said it should be made legal. A newscaster said of this story that “a majority of Americans think marijuana should be legalized”. Use hypothesis testing to see if this newscaster’s statement is justified.

Among students at a nearby college, the proportion who say they're interested in their congressional district's election results has traditionally been 70%. After a series of lackluster debates on campus, a political scientist claims that the proportion, p, of students at the college who say they're Interested in their district's election results is now less than 70%. A poll is commissioned, and 126 out of a random sample of 205 students at the college say they're interested in their district's election results. Is there enough evidence to support the political scientist's claim at the 0.05 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H.. H, :0 合 文 H, :0 (b) Determine the type of test statistic to use. D=0 OSO (Choose one) ▼…

According to the Pew Research Center, the proportion of the American population who use only a cellular telephone (no landline) is 0.37. Jason conducts a survey of thirty 20- to 24-year-olds who live on their own and finds that 16 do not have a landline to their home. Does this provide sufficient evidence to conclude that the proportion of 20- to 24-year-olds who live on their own and don’t have a landline is greater than 0.37? Use an a=0.10 level of significance. Note