Two machines used for cutting steel are calibrated to cut exactly the samelengths. To test this hypothesis, each machine is used to cut 10 pieces ofsteel. These pieces are then measured (with negligible measuring error).Suppose the resulting data are as follows:Machine 1 Machine 2 Machine 1 Machine 2122.40122.36 121.76122.40123.12121.88122.31122.12122.51122.20 123.20121.78123.12122.88122.48122.85122.55123.43 121.96123.04Assume that it is known that the standard deviation of the length of a cut(made by either machine) is equal to 0.50.(a) Test the hypothesis that the machines are set at the same value, thatis, that the mean lengths of their cuttings are equal. Use the 5 per-cent level of significance.(b) Find the p value.

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Answered: Two machines used for cutting steel are…

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 survey of the opinions of property owners about a street widening project was taken to determine whether the resulting opinion was related to the distance of front footage. A randomly selected sample of 100 property owners was contacted and the results are shown below. Opinion Front-Footage For Undecided Against Under 45 feet 12 4 4 45 – 120 feet 35 5 30 Over 120 feet 3 2 5 What is the computed value of chi-square? 5.4787 4.9985 9.2784 7.9842 11.0355
Can you answer c,d, and e please
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130 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 18 0.1385 18 1 21 0.1615 39 2 20 59 3 15 0.1154 4 16 0.1231 90 10 0.0769 100 6 0.1231 116 7 14 0.1077 130 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 5 times per week?
130 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 0 16 0.1231 16 1 21 0.1615 37 2 17 0.1308 54 3 15 4 15 0.1154 84 5 14 0.1077 98 6 16 0.1231 114 7 0.1231 130 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 5 times per week? %
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Answer the following questions based on these scores: A sample consists of the following n = 6 scores: -2, 7, 6, 4, 1, 3 A) What is the mean? M = B) What is the standard deviation? s = C) What is the Z-score for the raw score of 6? Z =
Based on data from the 2010 Census the average age of a Pierce County, Washington resident is 41 years with a standard deviation of 12.3 . The data is normally distributed. The median age, in years, is: a) 41 b) 38 c) 43 d) 33
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