ssume 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 Stained from human embryos." Of those polled, 482 were in favor, 403 were opposed, and 122 were unsure. A politician claims that people don't really understand e 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 were unsure nd use a 0.05 significance level to test the claim that the proportion of subjects who respond in favor is equal to 0.5. What does the result suggest about the plitician's claim? GREEN

An ABC News poll asked adults whether they felt genetically modified food was safe to eat. 35% felt it was safe, 52% felt it was not safe, and 13% had no opinion.A random sample of 120 adults was asked the same question at a local county fair. 40 people felt that genetically modified food was safe, 60 felt that it was not safe, and 20 had no opinion.At the 0.01 level of significance, is there sufficient evidence to conclude that the proportions differ from those reported in the survey? What is an apropriate alternate hypothesis for this problem? What is the critical value for this problem? What is the expected value for no opinion people? What is the Chi squared value for this problem? What is the appropriate decision?

A prognosticator makes 700 predictions regarding the outcomes of football games, and is correct with 546 of them. To a 5% level of significance, can it be asserted that he is, in general, right less than 80% of the time?

A home improvement company is interested in improving customer satisfaction rate from the 58% currently claimed. The company sponsored a survey of 273 customers and found that 171 customers were satisfied. Determine whether sufficient evidence exists that the customer satisfaction rate is different than the claim by the company.

A home improvement company is interested in improving customer satisfaction rate from the 51% currently claimed. The company sponsored a survey of 272 customers and found that 150 customers were satisfied. Determine whether sufficient evidence exists that the customer satisfaction rate is different than the claim by the company.

By a small margin, Facebook remains the top choice of social media over all ages, with 29% using Facebook most often among those using social media sites. However, more visually oriented social networks such as Snapchat and Instagram continue to draw in younger audiences. When asked "Which one social networking brand do you use most often?" the results in the table show the top brands chosen by Americans aged 12-34 who currently use any social networking site or service. Social M edia Site Faceboo k Snapchat Instagra m Twitter Percentage That Use Most Often 29 28 26 6 20 (a) What is the sum of the percentages for these top social media sites? Give your answer as an exact number. Macmillan Learning top social media sites: What percent of Americans aged 12-34 use other social media sites most often? Give your answer as an exact number. other social media sites: do %

An article published in the “American Journal of Public Health” describes the results of a health survey administered to 119 male convicts, 50 years of age or older, residing in a state social rehabilitation center. It was found that 21.6% of them claimed to have a history of venereal diseases. Based on these findings, we wish to evaluate whether more than 15% of this population has a history of venereal diseases. What would be the p value that allows evaluating the research question? A. 4.32 B. 2.09 C. -1.72 D. 0.018 E. 0.957

Sierra College students enrolled in an online Elementary Statistics course were asked to participate in an anonymous onlne survey. The survey asked the students "Which type of device will you primarily use to access your online course in Canvas?". Of the 152 students who answered this question, 20 responded "a desktop computer", 121 responded "a laptop computer", 6 responded "a smartphone", and 5 responded "a tablet". The Sierra College Mathematics Department believes that less than 5% of students enrolled in an online Elementary Statistics course primarily uses a smartphone to access their online course in Canvas. Use the data collected in the survey to conduct a hypothesis testing procedure to test this belief. What conclusion should be reached according to the results of this hypothesis test?

6.   b. Test statistic = ? c. P-value = ?  d. Reject/Accept null hypothesis ?   -0.92 is wrong for the test statistic

Last year, 41% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 32% planned to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 55 business owners.  Suppose the business owners in the sample do as they plan. Conduct a hypothesis test that can be used to determine whether the proportion of business owners providing holiday gifts had decreased from last year. State the hypotheses.