A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type Il ovens. A sample of 59 type I ovens has a mean repair cost of $89.31, with a standard deviation of $14.06. A sample of 70 type II ovens has a mean repair cost of $84.70, with a standard deviation of $20.80. Conduct a hypothesis test of the technician's claim at the 0.1 level of significance. Let uj be the true mean repair cost for type I ovens and u2 be the true mean repair cost for type Il ovens. Step 1 of 4: State the null and alternative hypotheses for the test. E Tables E Keypad Answer Keyboard Shortcuts Ho: H1 Ha: H1 • 42

A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type Il ovens. A sample of 59 type I ovens has a mean repair cost of $89.31, with a standard deviation of $14.06. A sample of 70 type II ovens has a mean repair cost of $84.70, with a standard deviation of $20.80. Conduct a hypothesis test of the technician's claim at the 0.1 level of significance. Let uj be the true mean repair cost for type I ovens and u2 be the true mean repair cost for type Il ovens. Step 1 of 4: State the null and alternative hypotheses for the test. E Tables E Keypad Answer Keyboard Shortcuts Ho: H1 Ha: H1 • 42

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Description: A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair costfor type Il ovens. A sample of 59 type I ovens has a mean repair cost of $89.3

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 technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type l ovens is greater than the repair cost for type Il ovens. A sample of 62 type I ovens has a mean repair cost of $86.71, with a standard deviation of $11.53. A sample of 61 type Il ovens has a mean repair cost of $79.77, with a standard deviation of $13.41. Conduct a hypothesis test of the technician's claim at the 0.05 level of significance. Let , be the true mean repair cost for type l ovens and uz be the true mean repair cost for type l ovens. Step 3 of 4: Determine the decision rule for rejecting the null hypothesis Ho. Round the numerical portion of your answer to three decimal places. Answer E Tables E Keypad Keyboard Shortcuts Previous Step Answers Reject Ho if |2| Submit Answer © 2020 Hawkes Learning MacBook Air 80 器 88 DO esc FS ! & 1 2 3 4 5 6 7 8 9 delete { } Q E R Y P tab A S D G H J K L caps lock return > ? с V N M hift shift control option…
Community college instructors' salaries in one state are very low, so low that educators in that state regularly complain about their compensation. The national mean is $45,661, but instructors from Mississippi claim that the mean in their state is significantly lower. They survey a simple random sample of 61 colleges in the state and calculate a mean salary of $43,024 with a standard deviation of $13,132. Test the instructors' claim at the 0.05 level of significance. Step 2 of 3: Compute the value of the test statistic. Round your answer to three decimal places.
A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type II ovens. A sample of 34 type I ovens has a mean repair cost of $⁢70.86, with a standard deviation of $⁢12.35. A sample of 48 type II ovens has a mean repair cost of $⁢67.84, with a standard deviation of $⁢21.72. Conduct a hypothesis test of the technician's claim at the 0.10.1 level of significance. Let μ1 be the true mean repair cost for type I ovens and μ2 be the true mean repair cost for type II ovens. Step 2 of 4 : Compute the value of the test statistic. Round your answer to two decimal places.
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An industrial plant wants to determine which of two types of fuel, electric or gas, is more cost efficient (measured in cost per unit of energy). Independent random samples were taken of plants using electricity and plants using gas. These samples consisted of 14 plants using electricity, which had a mean cost per unit of $55.06 and standard deviation of $8.25, and 12 plants using gas, which had a mean of $57.80 and standard deviation of $7.81. Assume that the populations of costs per unit are normally distributed for each type of fuel, and assume that the variances of these populations are equal. Can we conclude, at the 0.10 level of significance, that μ₁, the mean cost per unit for plants using electricity, differs from μ₂, the mean cost per unit for plants using gas? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of…
A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type Il ovens. A sample of 62 type l ovens has a mean repair cost of $86.71, with a standard deviation of $11.53. A sample of 61 type Il ovens has a mean repair cost of $79.77, with a standard deviation of $13.41. Conduct a hypothesis test of the technician's claim at the 0.05 level of significance. Let uj be the true mean repair cost for type I ovens and uz be the true mean repair cost for type Il ovens. Step 2 of 4: Compute the value of the test statistic. Round your answer to two decimal places. Answer O Tables E Keypad How to enter your answer Keyboard Shortcuts Previous Step Answers Submit Answer O 2020 Hawkes Learning MacBook Air 80 88 DI DD F1 F2 F4 F7 F8 F11 ! 23 $ & 1 2 3 4 + 7 8 9 Q W E R T Y U { [ A S D F H J K L C V B N M > ? otion command command option .. .-
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A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type Il ovens. A sample of 60 type I ovens has a mean repair cost of $74.06, with a standard deviation of $16.10. A sample of 68 type Il ovens has a mean repair cost of $67.73, with a standard deviation of $14.70. Conduct a hypothesis test of the technician's claim at the 0.1 level of significance. Let u, be the true mean repair cost for type I ovens and u, be the true mean repair cost for type Il ovens. Step 1 of 4: State the null and alternative hypotheses for the test. Answer O Tables E Keypad Keyboard Shortcuts Submit Answer O 2020 Hawkes Learning E P Search for anything 812 AM 11/25/2020 hp brt se delete home end pg up 共 %24 4 2. 3 6 9 +] 8 + backspace num lock Q E R T Y 8. home G H K enter 4 pause V M t shift 2 end alt talt ctri ins
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The distribution of professional baseball player salaries has a mean of $3.2 million. An analyst believes that the mean salary for teams on the East Coast is different. The analyst randomly selects 50 baseball players from teams on the East Coast and records their annual salaries. The mean salary for the players in the sample is $3.9 million with a standard deviation of $2.1 million. A significance test at an alpha level a = 0.05 of produces a P-value of 0.02. What is the correct interpretation of the P-value? Assuming the true mean salary is $3.2 million, there is a 2% probability that the null hypothesis is true by chance alone. Assuming the true mean salary is $3.2 million, there is a 2% probability of getting a sample mean of $3.9 million by chance alone. Assuming the true mean salary is $3.2 million, there is a 2% probability of getting a sample mean at least as extreme as $3.9 million by chance alone. Assuming the true mean salary is $3.2 million, there is a 98% probability that…