The table below shows the probability distribution for the number of times some students in my MATH 211 class said that they forgot to do their homework. Let X represent the random variable "number of times forgot to do hwk" (Note: number of times forgot to do hwk are
independent from each other) and P(X) the associated probability,
X х
PIX)
0.45
0
1
0.32
2
0.04
3
What is the probability that the "number of times forgot to do hwk" is at least 1.7(Round answer to 2 decimal places)
O a. 0.45
O b.0.32
O c.0.55
O d. 0.73
McGraw
AP
8:11 PM
11/9/2020

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.