1.) When I played baseball (from age 8 through high school), I had an overall batting average of .325 (meaning I got a hit 325 out of every 1000 at bats).
a) If I were to have 4 at bats in a particular game, what is the probability that I had at least 1 hit?
b) If I were to have 300 at bats in one season, what is the probability that I had at least 120 hits?
2.) A study of 74 patients with ulcers was conducted in which they were prescribed 40mg of Pepcid. After 8 weeks, 58 patients reported ulcer healing. With 95% confidence, is there enough evidence to indicate that the percentage of patients that reported ulcer healing after using Pepcid above 70%? Why or why not?
3.) Last year, the average overall score in my College Algebra classes was 72.5 with a standard deviation of 7.5 and the scores were distributed normally.
a) If the top 9% of scores were to earn A grades, what score would separate A grades from the rest?
b) What is the probability that the average overall score of 10 randomly selected tests is above 90.0?
Would this be considered unusual? Why or why not?
Hey guys my final in this class is coming up and out of about 50 questions these seem to be giving me the most trouble. what kind of equations would i use? any help at all would be appreciated.