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2. A machine that fills bottles with water is calibrated to fill each bottle with 11.9 ounces. The company wants to make sure that the machine is working properly by selecting 80 random bottles. The company got an average of 12 ounces with a sample standard deviation of s= 2.1. Is there enough evidence in the sample, at the 10% level of significance, to conclude that the machine is working properly?

2. A machine that fills bottles with water is calibrated to fill each bottle with 11.9 ounces. The company wants to make sure that the machine is working properly by selecting 80 random bottles. The company got an average of 12 ounces with a sample standard deviation of s= 2.1. Is there enough evidence in the sample, at the 10% level of significance, to conclude that the machine is working properly?

MATLAB: An Introduction with Applications
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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Solve number 2 in a simple way
2. A machine that fills bottles with water is calibrated to fill each bottle with 11.9 ounces. The company wants to make sure that the machine is working properly by selecting 80 random bottles. The company got an average of 12 ounces with a sample standard deviation of s= 2.1. Is there enough evidence in the sample, at the 10% level of significance, to conclude that the machine is working properly? 3. A company that makes computers has a computer with an average download speed of 87.2 Mbps. The company is in the process of making a new computer with hopes of a greater download speed. The company test 40 new computers and got an average of 91.4 Mbps with a sample standard deviation s = 12.9 Mbps. State the p-value and perform the test using the p-value approach with a level of significance of 1%. 4. At a restaurant, each customer spends an average of $15.21 to eat. The restaurant is going to offer a special in hopes that each customer will spend more money. The restaurant samples 30 randomly selected people and got an average of $16.54 per customer with a standard deviation of s = 3.71. State the p-value and perform the test using the p-value approach with a level of significance of 5%. 5. A university claims that the average starting salary for their graduates is $ 65,305. A high school senior that is selecting a college to attend thinks that number is smaller and randomly selects 45 graduates of the university and got an average starting salary to be $ 62,592 with a sample standard deviations = 8,903. State the p-value and perform the test using the p-value approach with a level of significance of 1%. https://www.teacherspayteachers.com/Store/My-Geometry-World
Transcribed Image Text:2. A machine that fills bottles with water is calibrated to fill each bottle with 11.9 ounces. The company wants to make sure that the machine is working properly by selecting 80 random bottles. The company got an average of 12 ounces with a sample standard deviation of s= 2.1. Is there enough evidence in the sample, at the 10% level of significance, to conclude that the machine is working properly? 3. A company that makes computers has a computer with an average download speed of 87.2 Mbps. The company is in the process of making a new computer with hopes of a greater download speed. The company test 40 new computers and got an average of 91.4 Mbps with a sample standard deviation s = 12.9 Mbps. State the p-value and perform the test using the p-value approach with a level of significance of 1%. 4. At a restaurant, each customer spends an average of $15.21 to eat. The restaurant is going to offer a special in hopes that each customer will spend more money. The restaurant samples 30 randomly selected people and got an average of $16.54 per customer with a standard deviation of s = 3.71. State the p-value and perform the test using the p-value approach with a level of significance of 5%. 5. A university claims that the average starting salary for their graduates is $ 65,305. A high school senior that is selecting a college to attend thinks that number is smaller and randomly selects 45 graduates of the university and got an average starting salary to be $ 62,592 with a sample standard deviations = 8,903. State the p-value and perform the test using the p-value approach with a level of significance of 1%. https://www.teacherspayteachers.com/Store/My-Geometry-World
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