Question

15. Find the probability of getting three good coils when three coils are randomly selected without replacement

16. A cereal company claims that the mean weight of the cereal in its packets is less than 14oz.

H0

H1

Points: 5 15) A batch consists of 12 defective coils and 88 good ones. Find the probability of getting three good coils when three coils are randomly selected without replacement. Show your work below. Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (W, P, c) for the indicated parameter. Extra work does not need to be shown for this question. Points: 5 16) A cereal company claims that the mean weight of the cereal in its packets is less than 14 oz. Ho H1 5

Answer 1

15) there is a total of 100 coils

88 good coils

Three good coils selected without replacement can be selected with probability $\frac{88}{100}(\frac{87}{99})(\frac{86}{98})=0.6786$

16)

Hoy = 14

$H_1: \mu < 14$ ( claim)