Follow the steps in Test of Hypothesis (pic) including your conclusion and round off the critical value and test statistic 4 decimal placesTwo suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measures in foot-pounds is an important characteristic. A random sample of 10 gears from supplier 1 results in x1 = 290 and s1 = 12 while another random sample of 16 gears from the second supplier results in x2 = 321 and s2 = 22. Is there evidence to support the claim that supplier 2 provides gears with higher mean impact strength. Use a =0.04, and assume that both populations are normally distributed with equal variances. A certain printing press is known to turn out an average of45 copies a minute. In an attempt to increase its output,an alteration is made to the machine, and then in 3 shorttest runs it turns out 46, 47, and 48 copies a minute. Isthis increase statically significant, or is it likely to besimply the result of chance of variation? Use a significancelevel of 0.05 1.Ho u = 45, there is no increase in copies> 45, there is an increase in copiesH,2.a = 0.053.One tailed test4.Critical region t = +2.92, df = 25.Test Statistic47-45T == 3.47www.com1 √36.Decision: Reject Ho7.Conclusion: The increase in copies in our samples is statisticallysignificant. It is not the result of chance of variation.

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Answered: Follow the steps in Test of Hypothesis…

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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Follow the steps in Test of Hypothesis (pic) including your conclusion and round off the critical value and test statistic 4 decimal places Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears measures in foot-pounds is an important characteristic. A random sample of 10 gears from supplier 1 results in x1 = 290 and s1 = 12 while another random sample of 16 gears from the second supplier results in x2 = 321 and s2 = 22. Is there evidence to support the claim that supplier 2 provides gears with higher mean impact strength. Use a =0.04, and assume that both populations are normally distributed with equal variances.

A certain printing press is known to turn out an average of
45 copies a minute. In an attempt to increase its output,
an alteration is made to the machine, and then in 3 short
test runs it turns out 46, 47, and 48 copies a minute. Is
this increase statically significant, or is it likely to be
simply the result of chance of variation? Use a significance
level of 0.05

1.
Ho u = 45, there is no increase in copies
> 45, there is an increase in copies
H,
2.
a = 0.05
3.
One tailed test
4.
Critical region t = +2.92, df = 2
5.
Test Statistic
47-45
T =
= 3.47
www.com
1 √3
6.
Decision: Reject Ho
7.
Conclusion: The increase in copies in our samples is statistically
significant. It is not the result of chance of variation.

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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