i) Test, at the 3% level of significance, whether the proportion of adults who experience an adverse reaction when taking ibuprofen is greater than the proportion of adults who experience an adverse reaction when taking acetaminophen.

Q: An online bookseller is considering selling an e-reader but will do so only if they have evidence that the proportion of customers who will likely purchase one is more than 0.4. Of a survey of 25 customers, 8 of them stated that they would likely purchase an e-reader. What should the bookseller do? Use a 5% significance level.

A research company wants to determine whether there is a difference in effectiveness of a brand- name ibuprofen and generic ibuprofen. What are the appropriate hypotheses for this testing scenario? Let µ equal the mean of the effectiveness of brand-name ibuprofen and µ2 equal the mean of the effectiveness of generic ibuprofen. O Ho: H1 - H2 = 0 Hạ: H1 - H2 > 0 O Ho: H1 - µ2 = 0 Hạ: H1 - H2 0 O Ho: X1 - X2 = 0 Hạ: X1 - X2 + 0

Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value when testing the hypothesis that the actual proportion of orange for all Reese's pieces is 0.5? Round to two places.

A local doctors office recorded the wait times for 70 patients on a saturday afternoon and organized he times in the histogram below a. what percent of people waited more than 15 minutes? b. what percent of people waited less than 20 minutes? c. what percent of people waited less than 5 minutes given they waited less than 20 minutes?

Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high school students were not being taught enough math and science. A recent survey found that 244 of 700 parents of children in h was a serious problem that high school students were not being taught enough math and science. Do parents feel differently today than they did twenty years ago? Use the a= 0.1 level of significance. Because npo (1-pPo) =U 10, the sample size is V 5% of the population size, and the sample the requirements for testing the hypothesis satisfied. (Round to one decimal place as needed.) What are the null and alternative hypotheses? V versus H,: Ho: (Type integers or decimals. Do not round.) Find the test statistic. Z, = (Round to two decimal places as needed.) Find the P-value. P-value = (Round to three decimal places as needed.) Determine the conclusion for this hypothesis test. Choose the correct answer below. O A. Since P-value a, reject the null hypothesis and…

Please answer all questions fully:  Are you an impulse​ shopper? A survey of 600 grocery shoppers indicated that 62​% of males and 51​% of females make an impulse purchase every time they shop. Assume that the survey consisted of 300 males and 300 females.   a. At the 0.05 level of​ significance, is there evidence of a difference in the proportion of males and females who make an impulse purchase every time they​ shop?  b. Find the​ p-value and interpret its meaning.

A chemist measures the haptoglobin concentrations (in grams per liter) in the blood of eight healthy adults.  Following are the values: 1.82   3.32   1.07   1.27   0.49   3.79   0.15   1.98  At the 2% significance level, test the claim that the mean haptoglobin concentration in adults is less than two grams per liter.    What type of error could you have made in your decision?

It is bleieved that the percent of convicted felons who have a history of juvenile deliquency is 70%.  Is there evidence to support the claim that the actual percentage is more than 70% if out of 200 convicted felons, we find that 154 have a history of juvenile deliquency?  Set the level of significance at a = 0.05

According to the Humane Society, 33% of households in the United States own at least one cat. You are interested in determining whether the proportion of households of the students at your school that own at least one cat is different from the national proportion. Suppose you survey an SRS of students at your school and find that 25% of them own cats, which yields a p-value of .092. Interpret this p-value.