Suppose you want to estimate a population mean correct to within 0.25 with probability equal to 0.95. You do not know the population variance but you are given that the observations will range in value between 20 and 40. Then the approximate sample size that will produce the desired accuracy of the estimate is a) 40
b) 1537
c)39
d)1536

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Which of the following graphs could represent a cubic function?