Suppose we wish to test the hypotheses: H(o): u=15 H(1): u does not = 15 where we know that σ^2 = 9.0. If the true mean is 20, what sample size must you choose to ensure that the probability of Type II error is no greater than 0.1?

Abox of chocolates costs $7. which equation relates the number of boxes sold (x) and total cost of the boxes sold (y)?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct