A company that makes cola drinks states that the mean caffeine 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 32.8 milligrams with a standard deviation of 7.9 milligrams. At a=0.05, can you reject the company’s claim?
a) Identify H0 and Ha
b) Find the critical value(s) (round to two decimal places as needed.
A. The critical value is
B. The critical values are ±1.96
c) Find the standardized test statistic. Z= (round to two decimal places as needed)
d) Decide whether to reject or fail to reject the null hypothesis.
A. since z is the rejection region, fail to reject the null hypothesis.
B. since z is not in the rejection region, fail to reject the null hypothesis.
C.since z is in the rejection region, reject the null hypothesis.
D.since z is not in the rejection region, reject the null hypothesis.
e)At the 5% significance level, there (is or) enough evidence to (support or) the companys claim that the mean caffeine content per 12-ounce bottle of cola (is different from, , is greater than, is less than) milligrams.
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more