Question

1. A random sample of 15 items is selected from a lot in which the proportion of defective items is 10%. Find the probability that the number of defective items in the sample is less than or equal to 3. (Hint: use the Binomial Distribution Table)

Group of answer choices

a. 0.0556

b. 0.8159

c. 0.9444

d. 0.1841

e. 0.9873

2. A continuous random variable X has a normal distribution with mean 25. The probability that X takes a value lesser than 22 is 0.20. Using this information and the symmetry of the density function, which of the following is the probability that X takes a value greater than 28.

Group of answer choices

a. 0.60

b. 0.40

c. 0.30

d. 0.80

e. 0.20

Answer 1