A company that makes cola drinks states that the mean caffeine content per 12-ou

Question

A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is 55 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 57.1 milligrams. Assume the population is normally distributed and the population standard deviation is 6.2 milligrams. At alpha = 0.08, can you reject the company's cam? Complete parts (a) through (e). Identify H_0 and H_a Choose the correct answer below H_0: mu greaterthanorequalto 57.1 H_a: mu

Explanation / Answer

nodetailed answer neede fine

a)hypothesis

option E

b) critical values are

The z-critical values for a two-tailed test, for a significance level of alpha =0.08 is

zc=1.75 and zc=1.75 ( +/- 1.75)

rejection region region

graph A

c)

z =1.173324741

1.17(round to two decimals)

d)

  option c

e)(is) (support) (is diffetrent from)

  

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