A company that makes cola drinks states that the mean caffeine content per​ 12-ounce bottle of cola is 35 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 35.4 milligrams. Assume the population is normally distributed and the population standard deviation is 7.9 milligrams. At α=0.05​, can you reject the​ company's claim? Complete parts​ (a) through​ (e).   Part 1​(a) Identify H0 and Ha.   Choose the correct answer below. A.) H0​:μ≥35.4       Ha​:μ<35.4   B.) H0​:μ≠35       Ha​:μ=35   C.) H0​:μ=35       Ha​:μ≠35   D.) H0​: μ≥35       Ha​: μ<35   E.) H0​: μ≠35.4      Ha​:μ=35.4   F.) H0​: μ=35.4     Ha​:μ≠ 35.4   (b) Find the critical​ value(s). Select the correct choice below and fill in the answer box within your choice.   ​(c) Find the standardized test statistic.       z=   ​(d) Decide whether to reject or fail to reject the null hypothesis.   ​(e) Interpret the decision in the context of the original claim.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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A company that makes cola drinks states that the mean caffeine content per​ 12-ounce bottle of cola is 35 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 35.4 milligrams. Assume the population is normally distributed and the population standard deviation is 7.9 milligrams. At α=0.05​, can you reject the​ company's claim? Complete parts​ (a) through​ (e).
 
Part 1​(a) Identify H0 and Ha.
 
Choose the correct answer below.
A.) H0​:μ≥35.4
      Ha​:μ<35.4
 
B.) H0​:μ≠35
      Ha​:μ=35
 
C.) H0​:μ=35
      Ha​:μ≠35
 
D.) H0​: μ≥35
      Ha​: μ<35
 
E.) H0​: μ≠35.4
     Ha​:μ=35.4
 
F.) H0​: μ=35.4
    Ha​:μ≠ 35.4
 
(b) Find the critical​ value(s). Select the correct choice below and fill in the answer box within your choice.
 
​(c) Find the standardized test statistic.
      z=
 
​(d) Decide whether to reject or fail to reject the null hypothesis.
 
​(e) Interpret the decision in the context of the original claim.

 

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