In a study of pain relievers, 100 people were given product A, and all but 25 experienced relief. In the same study, 20 people were given product B, and all but 6 experienced relief. Fill in the blanks below to make the most reasonable statement possible.   Product ▼(Choose one) performed better in the study. That is because %  got relief with this product, whereas only %      got relief with Product ▼(Choose one).

A auto shop wants to examine the proportion of customers that have to return after an appointment. Last year, an examination of 264 customers found that 30.1% had to return after an appointment. You instituted some changes at the auto shop this year, and found from a sample of 326 customers that 22.4% had to return after an appointment. You want to conduct an analysis to determine if there has been an increase in the proportion of customers that need to return after an appointment since the past year, with a = 0. 10. Using this information, what is the critical value of your analysis? Round your final answer to two decimal places. 2.11 1.96 2.33 1.28 1.64

General Motors wants to know if a newly designed car has a different appeal to people under 30 versus people over 50 (so they better know who to market the car towards). If there is at least a 10% difference in either proportion then GM will specifically design its marketing campaign towards that group (otherwise, they will target a more general audience). In another sample of 500 over-50, 375 expressed a favorable opinion of the car. In another sample of 450 under-30 year olds, 270 expressed a more favorable opinion of the new design (compared with the old design).a) At the 5% level of significance does it appear there is at least a 10% difference? b) What is the p-value?

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 %

Many fundraisers ask for donations using email and text messages. A paper describes an experiment to investigate whether the proportion of people who make a donation when asked for a donation by email is different from the proportion of people who make a donation when asked for a donation in a text message. In this experiment, 1.7% of those who received and opened an email request for a donation and 7.8% of those who received a text message asking for a donation actually made a donation. Assume that the people who received these requests were randomly assigned to one of the two groups (email or text message) and suppose that the given percentages are based on sample sizes of 2,000 (the actual sample sizes in the experiment were much larger). (Let p1 be the proportion who make a donation after receiving an email, and p2 be the proportion who make a donation after receiving a text message.) Find the test statistic and P-value. (Use a table or SALT. Round your test statistic to two…

A mail order company has 12.5% success rate of having people purchase their products.lt mails advertisements to 676 people and 10% of these people purchase products .What is P?

A certain affects virus 0.8% of the population. A test used to detect the virus in a person is positive 88% of the time if the person has the virus (true positive) and 13% of the time if the person does not have the virus (false postive). Fill out the remainder of the following table and use it to answer the two questions below.  (enter answer with no commas, i.e. as 1000 not 1,000.)     Infected Not Infected Total Positive Test [a] [b] [c] Negative Test [d] [e] [f] Total 800 99,200 100,000 i) Find the probability that a person has the virus given that they have tested positive. (Round your answer to the nearest tenth of a percent and do not include a percent sign.)[g]_______ % ii) Find the probability that a person does not have the virus given that they test negative. (Round your answer to the nearest tenth of a percent and do not include a percent sign.)[h]________ %

To determine the amount of sugar in a typical serving of breakfast cereal, a student randomly selected 60 boxes of different types of cereal from the shelves of a large grocery store. The student noticed that the side panels of some of the cereal boxes showed sugar content based on one-cup servings, while others showed sugar content based on three- quarter-cup servings. Many of the cereal boxes with side panels that showed three-quarter-cup servings were ones that appealed to young children, and the student wondered whether there might be some difference in the sugar content of the cereals that showed different-size servings on their side panels. To investigate the question, the data were separated into two groups. One group consisted of 29 cereals that showed one-cup serving sizes; the other group consisted of 31 cereals that showed three-quarter cup serving sizes. The boxplots shown below display sugar content (in grams) per serving of the cereals for each of the two serving sizes.…

In a study of pain relievers, 25 people were given product A, and 17 experienced relief. In the same study, 100 people were given product B, and 62 experienced relief. Fill in the blanks below to make the most reasonable statement possible. Product (Choose one) v performed worse in the study. That is because % failed to get relief with this product, whereas only % failed to get relief with Product (Choose one) v.

It is possible to score higher than 1600 on the SAT, but scores 1600 and above are reported as 1600. In 2007, the distribution of SAT scores (combining mathematics and reading) was close to normal with mean ?=1021and standard deviation ?=211. What is the probability that the reported 2007 SAT scores were higher than 1600?