Suppose we have samples of size n and m for two different normal populations. X1, X2, . . . , Xn ∼ N(µx, σ2 x ) Y1, Y2, . . . , Ym ∼ N(µy, σ2 y ) where µx, µy are unknown, but variances σ 2 x , σ2 y are known.

(a) (2pts) Construct a point estimator for the difference in means, i. e. µx − µy.

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample

Vertical angles must check all that apply

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30