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Posted: June 15th, 2022
An observational study based on survey data concluded
An observational study based on survey data concluded that individuals who took morevitamin C were able to recover from the flu faster. You want to replicate this study using anexperimental approach. The treatment in this experiment might be:Question 21 options:how long it takes to recover from the flu, in days.the change in body temperature over the period of the experiment.the amount of vitamin C taken per day: 0 mg, 1000 mg, 2000 mg, or 3000 mg.whether an individual took vitamin C in a pill form or liquid form.You conduct a hypothesis test and find a P-value of .025. Which of thefollowing is true?Question 22 options:You can reject Ho at the .01 significance level.You can reject Ho at the .05 significance level.You can accept Ho at the .05 significance level.You can say the probability that Ho is true at p = .025.Which of the following is a necessary step in every hypothesis testing procedure using a teststatistic?Question 23 options:State the null and alternative hypotheses in the context of the problem.Compute the test statistic and use it to find the p-value.State a conclusion in context of the problem.All of the above are steps in conducting a hypothesis test.Compute a test statistic for a random sample with n = 23, s = 2.33, x(bar) = 15.5 for thetest Ho: µ =14.75, Ha: µ ≠ 14.75Question 24 options:1.541.962.0741.717Suppose a study showed that the four most popular pizzas are preferred inthe following percentages:ToppingPercentCheese 24Pepper32oniSausag29eVeggie 15You decide to keep track of the next 150 pizzas of these types ordered at therestaurant where you work to see if the percentages hold true. This is thedata you get at your restaurant:ToppingObservedNumberCheese 41Pepper55oniSausag36eVeggie 18Find the chi-square statistic and the associated P-value for a hypothesis testwhere the null hypothesis is that the distribution of pizza toppings is asreported in the study, and where the alternative hypothesis is that thedistribution of pizza toppings is different from that reported in the study.Question 25 options:X2 = 150.5, P = 0X2 = 3.908, P = .419X2 = 3.908, P = .097X2 = 3.908, P = .272
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