A psychology researcher was conducting a study about newlywed heterosexual couples during the first two years of their marriage. 513 newlywed couples were randomly chosen for the study. One of the questions that the researcher was interested in was "During a typical week, how many times do you have sex?" The 513 responses had an average of 2.35 and standard deviation of 1.2. Another question that was asked is "During a typical week, how many evenings do you go out?" 171 of the couples answered that they go out more than twice a week.What is the point estimate for the proportion of all newlyweds who go out more than twice during a typical week?

A researcher would like to estimate p, the proportion of U.S. adults who support recognizing civil unions between gay or lesbian couples. Due to a limited budget, the researcher obtained opinions from a random sample of only 2,222 U.S. adults.With this sample size, the researcher can be 95% confident that the obtained sample proportion will differ from the true proportion (p) by no more than which of the following percentages (answers are rounded)? 0.04% 0.75% 2.1% 3%Question 13Select one answer.10 pointsA researcher would like to estimate p, the proportion of U.S. adults who support raising the federal minimum wage.If the researcher would like to be 95% sure that the obtained sample proportion would be within 2.4% of p (the proportion in the entire population of U.S. adults), what sample size should be used? 6,945 1,737 435 42

A study on exercise habits used a random sample of 2,540 college students (1,220 females and 1,320 males).The study found the following:818 of the females in the sample exercise on a regular basis.924 of the males in the sample exercise on a regular basis.The average time that the 1742 students who exercise on a regular basis (818 + 924) spend exercising per week is 4.2 hours.What is the point estimate for the proportion of all female college students who exercise on a regular basis? (Numbers are rounded to two decimal places as needed.)  Incorrect. You need to find what proportion of the females in the sample exercise on a regular basis. It looks like you incorrectly used the total sample size (2,540) in the denominator.xReset this ActivityWhat is the point estimate for the proportion of all college students who exercise on a regular basis? (Numbers are rounded to two decimal places as needed.)

Question 1Matrimony Monthly is a magazine that provides information for couples thinking about marriage. Over the years, writers for the magazine have researched just about everything there is to research about weddings. The popular conception at the magazine has been that roughly 50% of first weddings take place indoors in a church, 30% take place indoors in a building other than a church, and 20% take place outdoors. This past week, the magazine examined a random sample of 280 first weddings and found the distribution given by the first row of numbers in the table below. (This row contains the frequencies observed in their sample of 280.) The second row of numbers gives the frequencies expected under the hypothesis that the popular conception at the magazine is correct. The bottom row of numbers contains the following value for each of the wedding location categories.−fOfE2fE= −Observed frequencyExpected frequency2Expected frequencyPart 1Fill in the missing values in the table. Round your responses for the expected frequencies to two or more decimal places. Round your −fOfE2fE responses to three or more decimal places.Send data to ExcelIn a church Indoors but not in a church Outdoors TotalObserved frequencyfO fO146 fO72 fO62 280Expected frequencyfE fE84 fE84.00 fE84 −fOfE2fE −fOfE2fE56 −fOfE2fE1.714 −fOfE2fE56 Part 2Answer the following to summarize the test of the hypothesis that the actual distribution of first wedding locations matches the distribution in the magazine's popular conception. Use the 0.05 level of significance for the test.(a)  Determine the type of test statistic to use.Type of test statistic: ▼Chi-squareDegrees of freedom: (b)  Find the value of the test statistic. (Round your answer to two or more decimal places.)2.614(c)  Find the critical value. (Round your answer to two or more decimal places.)5.991(d)Can we conclude that the actual distribution of location of first weddings is different from the distribution in the magazine's popular conception?Yes No

A survey was conducted to obtain information on alcohol consumption. A random sample of males gave: Marital Status teetotal drinking 1-20 units/week drinking 21+units/week Totalsingle 83 283 98 464married 427 608 150 1185divorced 92 50 9 151widowed 31 51 18 100Totals 633 992 275 1900 Find the following probabilities that a randomly chosen male involved in this survey (i) is single       (Give your answer correct to 3 decimal places )    (ii) is drinking 1-20 units/week   (Give your answer correct to 3 decimal places )     (iii) is either single or married  (Give your answer correct to 3 decimal places )         (iv) is teetotal or drinking 21+ units/week   (Give your answer correct to 3 decimal places )   (v) is widowed and teetotal

A certain test is designed to measure the satisfaction of an individual with his/her relationship. Suppose that the scores on this test are approximately normally distributed with a mean of 55 and a standard deviation of 8. An individual with a score of 45 or less is considered dissatisfied with his/her relationship. According to this criterion, what proportion of people in relationships are dissatisfied? Round your answer to at least four decimal places.