I have two questions that I need help solving: It has been reported that 83% of federal government employees use email. If a sample of 200 federal government employees is selected, find the mean, variance, and standard deviation of the number who use email. In a survey, 63% of Americans said...

I'm having a difficult time getting my head around the idea that B and A in the regression equation Y= BX + A are statistics and that their signifcance can be estimated. Where is the sample of Bs and As, from which the standard error of each estimate is derived? I'd prefer an explanation that I...

Did I answer these correctly? True 1.A simple random sample is formulated in such a manner that each item or person in the population has an equal chance of being included in the sample. False 2.If nonprobability methods are used, not all items or people have a chance of being included...

let say 20% percent of americans used the emergency room last year. Now if I choose 17 people at random find the probability that 6 of them used the emergency room last year. Also finf the probability that at least 5 used the emergency room last year. Finally find the mean and the variance of...