Attitudes toward drinking and behavior studies

Assignment Help Basic Statistics

Reference no: EM131011448

Attitudes toward drinking and behavior studies

Some of the methods in this section are approximations rather than exact probability results. We have given rules of thumb for safe use of these approximations.

(a) You are interested in attitudes toward drinking among the 75 members of a fraternity. You choose 30 members at random to interview. One question is "Have you had ?ve or more drinks at one time during the last week?" Suppose that in fact 30% of the 75 members would say "Yes." Explain why you cannot safely use the B(30, 0.3) distribution for the count X in your sample who say "Yes."

(b) The National AIDS Behavioral Surveys found that 0.2% (that's 0.002 as a decimal fraction) of adult heterosexuals had both received a blood transfusion and had a sexual partner from a group at high risk of AIDS. Suppose that this national proportion holds for your region. Explain why you cannot safely use the Normal approximation for the sample proportion who fall in this group when you interview an SRS of 1000 adults.

Reference no: EM131011448

Questions Cloud

What do you recommend as an outcome to this topic or issue : Select a topic that is of personal interest, thoroughly research it to make judgments. What do you recommend as an outcome to this topic or issue?

Explain differences in temporal orientation among countries : Which inter-cultural issues noted in the Country Insights database help to explain differences (if any) in Temporal Orientation among the four countries? What are some of the differences

Which alternative would you choose and why : Which alternative would you choose and why? What additional information would help you make the best decision?

Development and growth of the entrepreneur : Discuss the history, development and growth of the entrepreneur to see what made this person successful - discuss the role of their family and socio-cultural background in the development of their entrepreneurial passion

Attitudes toward drinking and behavior studies : Some of the methods in this section are approximations rather than exact probability results. We have given rules of thumb for safe use of these approximations.

Determining the visits to web sites : What kinds of Web sites do males aged 18 to 34 visit most often? Pornographic sites take ?rst place, but about 50% of male Internet users in this age group visit an auction site such as eBay at least once a month.2 Interview a random sample of 15 ..

Question regarding the typographic errors : Typographic errors in a text are either nonword errors (as when "the" is typed as "teh") or word errors that result in a real but incorrect word. Spell-checking software will catch nonword errors but not word errors.

Discuss some of the advantages or disadvantages of using the : Discuss some of the advantages or disadvantages of using the cash-basis method of accounting

Find the set of fundamental solutions : Find the set of fundamental solutions by using the differential operator method: [D2 - (2α - 1)D + α (α - l)y = 0, t ∈ (0, ∞); and determine the values of α, for which all solutions tend to zero as t→∞.

User Account

All Pages