Answered: 13 7.2 A company that makes cola…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

13 7.2

A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola is

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

52.4

milligrams. Assume the population is normally distributed and the population standard deviation is

7.4

milligrams. At

α=0.10,

can you reject the company's claim? Complete parts (a) through (e).

(a) Identify

and

Ha.

Choose the correct answer below.

H0:

μ=50

Ha:

μ≠50

Your answer is correct.

H0:

μ≠50

Ha:

μ=50

H0:

μ≥52.4

Ha:

μ<52.4

H0:

μ≥50

Ha:

μ<50

H0:

μ≠52.4

Ha:

μ=52.4

H0:

μ=52.4

Ha:

μ≠52.4

(b) Find the critical value(s). Select the correct choice below and fill in the answer box within your choice.

(Round to two decimal places as needed.)

The critical values are

±enter your response here.

The critical value is

enter your response here.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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