A pharmaceutical company showed the following in an article:
"our entire sample of 1500 subjects with a cold were treated with
our new medicine. Within three days, 95% were asymptomatic." The
company claims the new medicine was effective.
Is this conclusion justified?
"our entire sample of 1500 subjects with a cold were treated with our new medicine. Within three days, 95% were asymptomatic" means 1500*0.95=1425 subjects are asymptomatic and 75 subjects are not. Since the sample size is large enough so the company's claim is justified.
A pharmaceutical company showed the following in an article: "our entire sample of 1500 subjects with...
QUESTION # 1 A random sample of 5060 permanent dwellings on an entire reservation showed that 1571 were traditional hogans. (a) Let p be the proportion of all permanent dwellings on the entire reservation that are traditional hogans. Find a point estimate for p. (Round your answer to four decimal places.) (b) Find a 99% confidence interval for p. (Round your answer to three decimal places.) lower limit _________ upper limit _________ QUESTION # 2 What is the minimal sample...
Identify the CONCLUSION of a hypothesis test of the following claim and sample data: Claim: “The proportion of symptom-free placebo subjects is less than the proportion of symptom-free subjects who received a new supplement.” A medical researcher wants to determine if a new supplement is effective at reducing the duration of the common cold. Healthy subjects are intentionally infected with a cold-causing virus, and then given either a placebo or the new supplement one day later. Of the 267 subjects...
A large study showed that aspirin reduced the rate of first heart attacks. A pharmaceutical company thinks that they have a drug that will be more effective than aspirin, and plans to do a randomized clinical trial to test the new drug. They determine the following null and alternative hypotheses: Example 2: a) Ho: the new drug is not more effective than aspirin HA: the new drug is more effective than aspirin hey conduct the trial. The group that used...
Part A: Suppose you work for a pharmaceutical company that is testing a new drug to treat ulcerative colitis. You conduct a random sample of 34 patients on the new drug and 14 of them indicated a decrease in symptoms since starting the drug regimen. You construct a 90% confidence interval for this proportion to be ( 0.2733 , 0.5502 ). What is the correct interpretation of this confidence interval? 1) We are certain that 90% of patients will be...
Question 1:
Question 2:
Question 3:
A certain pharmaceutical company produces a hand sanitizer that it wants to package in 4 fl oz (fluid ounces) plastic bottles. The machines that dispense the liquid into the bottles on the assembly line must be calibrated so that they do not vary significantly from the 4 fl oz container size, nor from each other. The quality control specialists at the company take a random sample of 4 bottles produced from the three machines...
A random sample of 320 medical doctors showed that 180 had a solo practice. (a) Let p represent the proportion of all medical doctors who have a solo practice. Find a point estimate for p. (Use 3 decimal places.) (b) Find a 98% confidence interval for p. (Use 3 decimal places.) lower limit upper limit Give a brief explanation of the meaning of the interval. 98% of the all confidence intervals would include the true proportion of physicians with solo...
A pharmaceutical company manufactured a prescription drug that contained a tablet inside another tablet. This inner tablet, called a “core,” needed to be in the exact center of the larger tablet, and tolerances were measured in tenths of millimeters. The process was not robust, and the placement of the inner tablet sometimes drifted, requiring the scrapping of off-quality product and the adjustment of the tablet press. This resulted in significant scrap and tablet press downtime. A process change was invented...
Beview 1JA survey of 700 non-fatal accidents showed that 183 involved faulty equipment. Find a point estimate for p, the population proportion of accidents that involved faulty equipment. 2) An article a Florida newspaper reported on the topics that teenagers most want to discuss with their pare nts. The findings, the results of a poll, showed that 46% would like more discussion about the family's financial situation, 37% would like to talk about school, and 30% would like to talk...
A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 21 patients were recorded before administering the drug and after. The 90% confidence interval for the true mean difference in total cholesterol levels (after - before) was (14.93, 45.35). Which of the following is the appropriate conclusion? 1) We are 90% confident that the average difference in cholesterol levels is positive, with the higher cholesterol levels being after the drug regimen. 2) We...
GE case study, Scenario - Case Study on General Electric (GE) by Jeffrey R. Immelt (Article adapted from Harvard Business Review) A CEO has different tasks in different cycles. Some CEOs are founders and builders. Others have the luxury of managing momentum through a stable economy or a period when business models aren’t being disrupted. My task was different: remaking a historic and iconic company during an extremely volatile time. I led a team of 300,000 people for 6,000 days....