you're testing two flu drugs A and B. Drug A works on 41 people out of a sample of 195. Drug B works on 160 people in a sample of 605. Is there evidence that drug B works better. Use a 5% alpha level.

Please see the image below. Please include explanation of what was done.

A county environmental agency suspects that the fish in a particular polluted lake have elevated mercury levels. To confirm that suspicion, five striped basses in that lake were caught and their tissues were tested for mercury. For the purpose of comparison, four striped basses in an unpolluted lake were also caught and tested. The fish tissue mercury levels in mg/kg are given below. Sample I(From Polluted Lake) 0.523 0.723 0.523 0.623 0.523 Sample II(From Unpolluted Lake) 0.323 0.223 0.523 0.323 0.000 (a) Construct the 95% confidence interval for the difference in the population means based on these data. (b) Test, at the 5% level of significance, whether the data provide sufficient evidence to conclude that fish in the polluted lake have elevated levels of mercury in their tissue.

In an article about unusual allergies, a doctor explained that allergy to sulfites is usually seen in patients with asthma. The typical reaction is a sudden increase in asthma symptoms after eating a food containing sulfites. Studies are performed to estimate the percentage of the nation's 10 million asthmatics who are allergic to sulfites. In one survey, 33 of 500 randomly selected asthmatics in the country were found to be allergic to sulfites. Find and interpret a 95% confidence interval for the proportion, p, of all asthmatics in the country who are allergic to sulfites. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. ..... The 95% confidence interval is from to (Round to three decimal places as needed.)

In an article about unusual allergies, a doctor explained that allergy to sulfites is usually seen in patients with asthma. The typical reaction is a sudden increase in asthma symptoms after eating a food containing sulfites. Studies are performed to estimate the percentage of the nation's 10 million asthmatics who are allergic to sulfites. In one survey, 22 of 400 randomly selected asthmatics in the country were found to be allergic to sulfites. Find and interpret a 90% confidence interval for the proportion, p, of all asthmatics in the country who are allergic to sulfites. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. The 90% confidence interval is from to. (Round to three decimal places as needed.) Interpret the confidence interval. Choose the correct answer below. O A. With 90% confidence, the true proportion of all asthmatics in the country who are allergic to…

In an article about unusual allergies, a doctor explained that allergy to sulfites is usually seen in patients with asthma. The typical reaction is a sudden increase in asthma symptoms after eating a food containing sulfites. Studies are performed to estimate the percentage of the nation's 10 million asthmatics who are allergic to sulfites. In one survey, 39 of 600 randomly selected asthmatics in the country were found to be allergic to sulfites. Find and interpret a 95% confidence interval for the proportion, p, of all asthmatics in the country who are allergic to sulfites. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. to The 95% confidence interval is from (Round to three decimal places as needed.) Interpret the confidence interval. Choose the correct answer below. O A. There is a 95% probability that the sample proportion of all asthmatics in the country who are…

You read a study about how opioid addiction can only be treated by addiction centers.  It was paid for by some addiction recovery centers. It was done by looking at 14 of their patients. Do you think this a valid study?Explain your answer.

You hypothesize that 75% of physics students are guys. You take a random survey of 12 physics students and learn that seven of them are guys. Do your findings vary dramatically from what you expected?

This is an Epidemiology problem.  Cataracts of the eye may be difficult to diagnose in the early stages. In a study to evaluate the reliability of their diagnoses, two physicians each examined the same 1,000 eyes, without knowing the other’s diagnoses. Each physician found 100 eyes with cataracts. Does this mean that the diagnoses are reliable? Explain your position.

Cholera, a serious intestinal disease, broke out in London in the mid-19th century. Research by a physician named John Snow indicated that the disease was caused by germs in polluted water. A vaccine for cholera was then developed in the late 1800s. A vaccine is a drug that helps a person become immune to a disease. Scientists studied 818 people to determine the effects of a cholera vaccine. The study lasted from 1894 to 1896.   Infected Not Infected Vaccinated 3 276 Not Vaccinated 66 473 Use the information in the table to complete the following four statements. Round to the nearest tenth of a percent.         (a) % of those vaccinated were infected. Round to one decimal place.