A report in a research journal states that the average weight loss of people on a certain drug is 35 lbs with a margin of error of +5 lbs with confidence level C = 95%.
(a) According to this information, the mean weight loss of people on this drug. , could be as low as 30
(b) If the study is repeated, how large should the sample size be so that the margin of error would be less than 2.5 lbs? (Assume o = 5 lbs.)
ANSWER:

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

The host of a game show is holding a bag with chips to see what prizes the contestants will play for. five (5) of the chips say “new car” ten (10) of the chips say “new tv” three (3) of the chips say “trip to france” contestant named “patty” reaches into the bag. a. what is the probability of choosing a tv chip? b. what is the probability of choosing a car chip next without replacing the 1st chip? c. are these dependent or independent events?