A study was conducted to evaluate the effect of calcium supplement on preventing postmenopausal osteoporosis. Among 300 women aged 60 and above who took calcium supplements regularly, 15% had postmenopausal...
A study was conducted to evaluate the effect of calcium supplement on preventing postmenopausal osteoporosis. Among 300 women aged 60 and above who took calcium supplements regularly, 15% had postmenopausal...
a recent study reported that the prevalence of obesity is 45% in children ages 6-12. If 15 children were analyzed what is the probability that 7 are obese?
A randomized research study is designed to determine whether albuterol by nebulization improves pulmonary function in children with bronchiolitis. Twenty chidren, ten of whom receive albuterol and...
Find the mean and stand deviation?
You have just bought a new car that claims to get a highway efficiency of 31 miles per gallon. Of course, your mileage will "vary". If you had to guess, would you expect the interquartile...
Years after Introduction(X) Number(Y) (Xi - X) (Yi - Y) (Xi - X)(Yi - Y) 1 ...
You plan to conduct an experiment to test the effectiveness of Sleepeze, a new drug that is supposed to reduce insomnia. You will use a sample of subjects that are treated with the drug and another...
1. Is there a difference in age between patients on the fast-track protocol, and those receiving standard care? 2. Is the proportion of patients who are female in the fast-track group significantly...
Biostatistics