Dr. Shepard is testing a new drug to treat arthritis symptoms. He uses a sample group of 1,000 arthritis sufferers, and has them each take the drug when experiencing symptoms, such as swelling, pain, and redness of the joints. Of this sample group, 839 report that their arthritic symptoms seem to subside after taking the drug. From this data, Dr. Shepard concludes that the drug is effective. Is his conclusion scientifically valid?

Which sentences do not meet the requirements of an effective thesis statement? select all that apply. due to educational cutbacks, we really need your to buy new softball and baseball equipment. if you donate to our cause, you will receive free tickets to all our school's sporting events. your generous donation will allow our school to offer softball and baseball this year. in addition to free tickets, we will allow you to hang an advertising banner on the outfield fence. if you donate to support our cause, you will not only receive free tickets and a free advertising opportunity, you will earn the devotion and loyalty of many within our school.