A poll asked the following question: "If
the military draft were reinstated, would you favor or oppose
drafting women as well as men?" 49 percent of the 1000 people
responding said that they would favor drafting women if the draft
were reinstated. Using a 0.05 significance level, carry out a test
to determine if there is convincing evidence that fewer than half
of adult Americans would favor the drafting of women. (For z give
the answer to two decimal places. For P give the answer to four
decimal places.)
A poll asked the following question: "If the military draft were reinstated, would you favor or...
A recent opinion poll of funding for the arts asked, “Would you
favor spending more federal tax money on the arts?” In a random
sample of 220 women from the U.S., 59 responded ‘yes.’ In a random
sample of 175 men from the U.S., 56 responded ‘yes.’ Use these data
as follows, to test whether there is any difference in the
proportion of men vs. women who favor spending more for the
arts:
c. From the output, report the test...
Assume that adults were randomly selected for a poll. They were asked if they "favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human embryos." Of those polled, 482 were in favor, 401 were opposed, and 122 were unsure. A politician claims that people don't really understand the stem cell issue and their responses to such questions are random responses equivalent to a coin toss. Exclude the 122 subjects who said that they...
Adults randomly selected for a poll were asked if they "favor or oppose using federal tax dollars to fund medical research using stem cells obtained from human embryos." Of the subjects surveyed, 308 were in favor, 294 were opposed, and 82 were unsure. A politician claims that people don't really understand the stem cell issue and their responses to such questions are random responses equivalent to a coin flip. Use a 0.01 significance level to test the claim that the...
Suppose a poll of adults asked, "Have you ever driven a car when you probably had too much alcohol to drive safely?" of the 300 men who answered, 186 (62%) said yes and 111 (37%) said no. The remaining three weren't sure. Of the 300 women, 84 (28%) said yes while 213 (71%) said no, and the remaining three weren't sure. (You may need to use a calculator. Round your answers to two decimal places.) (a) Ignoring those who said...
In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total of 200 men and 200 women were asked this question. "Yes" was the response given by 34% of the men and 25% of the women. Based on this survey, can we conclude that there is a difference in the proportion of men and women responding...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they did. Find the margin of error of this poll, at the 90% confidence level. As in the reading, in your calculations: --Use z1.645 for a 90% confidence interval -Use z=2 for a 95% confidence interval -Use z-2.576 for a 99% confidence interval Give your answer rounded to three decimal places. If n=560 and p (p-hat) = 0.7, construct a 99% confidence interval. As in...
A study was done to investigate what people think is "creepy." Each person in a sample of women and a sample of men were asked to do the following. Imagine a close friend of yours whose judgment you trust. Now imagine that this friend tells you that she or he just met someone for the first time and tells you that the person was creepy. The people in the samples were then asked whether they thought the creepy person was...
In a recent poll 1049 randomly selected adults were asked whether they approve of labor unions: 64% said yes. In 1936, about 68% of adults approved of labor unions. At the 5% significance level, do the data provide sufficient evidence to conclude that the percentage of adults who approve of labor unions has decreased since 1936? Use the one-proportion 2-test to perform the appropriate hypothesis test, after checking the conditions for the procedure. What are the hypotheses for the one...
A survey of adult men and women asked, "Which one of the following jobs would you most like to have?" The results of the survey are shown in the Job table (a) Construct a relative frequency distribution for men and women (b) Construct a side-by-side relative frequency bar graph. (c) What are the apparent differences in gender as it pertains to this question? Men Women o 24 13 37 13 Not sure 18 (a) Complete the table below Job omen...
An organization surveyed 1000 teens and 1000 parents of teens to learn about how teens are using social networking sites such as Facebook and MySpace. The two samples were independently selected and were chosen in a way that makes it reasonable to regard them as representative of American teens and parents of American teens. (a) When asked if they check their online social networking sites more than 10 times a day, 226 of the teens surveyed said yes. When parents...