A consumer products company is formulating a new shampoo and is interested in foam height (in millimeters). Foam height is approximately normally distributed and has a standard deviation of 20 millimeters. The company wishes to test \( H_0: \mu = 175 \) millimeters versus \( H_1: \mu > 175 \) millimeters, using the results of \( n \) samples. Find the boundary of the critical region if the Type I error probability is \( \alpha = 0.03 \) and \( n = 4 \).Round your intermediate values to two decimal places. Round your answer to one decimal place (e.g., 98.76).\[\bar{X} \geq\]

The hypotheses are:where is the foam height.The population standard deviation is millimeters.The…

Answered: A consumer products company is…

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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A company claims that the mean monthly residential electricity consumption in a certain region is more than 860 kiloWatt-hours (kWh). You want to test this claim. You find that a random sample of 66 residential customers has a mean monthly consumption of 900 kWh. Assume the population standard deviation is 123 kWh. At a = 0.10, can you support the claim? Complete parts (a) through (e). B. The critical value is 1.28 Identify the rejection region(s). Select the correct choice below. O A. The rejection regions are z 1.28 OB. The rejection region is z > 1.28 OC. The rejection region is z< 1.28. (c) Find the standardized test statistic. Use technology. The standardized test statistic is z = (Round to two decimal places as needed.)
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