Each question on a multiple-choice exam has five choices. One of the choices is the correct answer, worth 6 points, another choice is wrong but still carries partial credit of 2 points, and the other three choices are worth 0 points. If a student picks answers at random, what is the expected value of his or her score for a problem?
points

If the exam has 50 questions, what is his or her expected score?
points

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.

Need me know if option a,b,c are wrong so ik its d

Amanufacturing firm has been averaging 16.8 orders per week for several years. however, during a recession, orders appeared to slow. suppose the firm’s production manager randomly samples 31 weeks and finds an average of 15.6 orders with a standard deviation of 2.3 orders. using a 0.025 significance level, test whether the mean number of orders has decreased. type the full 5 step procedure into the answer box, then for multiple choice practice, answer the following: 1. what is the name and symbol of the parameter that you are testing? 2. what is the symbol and value of the point estimate of that parameter? 3. what distribution are you using to test this parameter? 4. what is the critical value? 5. what is the test statistic value? 6. what is the p-value?