A doctor knows that the medical test for a certain health condition gives accurate results 72% of the time. Find the probability that if 6 of these tests are randomly selected, at least one of them is accurate. 0.28 0.999518109696 1.68 0.000481890304 0.139314069504 0.860685930496

The prevalance of mild myopia (nearsightedness) in adults over age 40 is 27% in the US. Suppose eight adults over age 40 are chosen at random from the population; let Y denote the number of adults with mild myopia. Which of the following can be used to find the probability that 3 of them have mild myopia? [Select all that apply (i.e. you may select 1 or more answers)] A. pbinom(3, 8, 0.27) OB. dbinom(3, 8, 0.27) OC. 1-pbinom(3, 8, 0.27) OD. 56(0.27) 5 (0.73)³ OE. 3(0.27) ³ (1 - 0.27)5 OF. (0.27)³ (0.73)5

The probability that a machine develops a fault within the first 3 years of use is 0.003. If 40 machines are selected at random, the probability that 38 or more will not develop any faults within the first 3 years of use is ....

Suppose that warranty records for a car maker show that the probability that a new car needs a warranty repair in the first 90 days is 20%. If a random sample of 20 new cars is selected, what is the probability that more than 6 will need a warranty repair? 0.0321 0.9133 0.0867 0.1091