9.55 1-9403-abf9e2add3f5/pages/a2ca3bd4df635a91c6313a16cb6380e7e1b8484ed?location=%7B"id"%3...arond...9.559.56Chapter 9: Section ExercisesTelevisions: CI (Example 14-) Minitab output is shown for a two-sample t-interval forthe number of televisions owned in households of random samples of students at twodifferent community colleges. Each individual was randomly chosen independently ofthe others. One of the schools is in a wealthy community (MC), and the other (OC) is ina less wealthy community.Two-Sample T: CISampleOCTVSMCTVSN300Mean3.703.33StDev1.491.49Difference = μ (1) - μ (2)Estimate for difference: 0.37095% CI for difference: (-0.400, 1.140)SE Mean0.270.27APa. Are the conditions for using a confidence interval for the difference between twomeans met?b. State the interval in a clear and correct sentence.c. Does the interval capture 0? Explain what that shows.Pulse and Gender: CI Using data from NHANES, we looked at the pulse rate for nearly

Answered: Image /qna-images/answer/b04259ed-080b-4209-89ed-efc1a00515b3.jpg

Answered: 9.55 Televisions: CI (Example 14-)…

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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7. The manufacturer of an Engine Energizer System (EES) claims that it improves gas mileage and reduces emissions in automobiles by using magnetic-free energy to increase the amount of oxygen in the fuel for greater combustion efficiency. Following are test results, performed under international and U.S. government agency standards, on a random sample of 14 vehicles. The data (also see file M09_Gas_Paired.txt or M09_Gas_Q7.xlsx) give the carbon monoxide (CO) levels, in parts per million, of each vehicle tested, both before installation of EES and after installation. (a)Test at the 1% significance level whether, on average, EES reduces CO emissions (b)Obtain a 99% confidence interval for the difference between the mean CO emissions before and after installation of EES corresponding to the test in part (a) (c)Interpret the confidence interval obtained in part (b). Does this interval support the conclusion of the hypothesis test in part (a)? Justify your answer
Suppose a fertilizer company wants to test the effectiveness of a new fertilizer on its corn fields. The company divides a corn field into rectangular patches of the same area and randomly selects certain patches to which the fertilizer is applied and other patches to which no fertilizer is applied. The patches to which no fertilizer is applied serves as a *fill in the blank* for the experiment. (i) control (ii) placebo (iii) observation (iv) non-treatment
The contingency table shows the result of a random sample of students by Ziyi Zhang at PCC and the number of hours they spend investing on Robinhood and Acorns by age and gender. At alpha =0.05, can you conclude that age is related to gender when it comes to time spent investing on Robinhood and Acorns. GENDER 16-20yrs 21-30yrs 31-40yrs 41-50yrs 51-60yrs 61yrs or older Male 45 170 90 72 45 26 Female 9 30 21 17 10 5 What is the Chi-square test statistics and the decision for this question. The Test statistics is . Leave your answer in 3 decimal places. DECISION: We the null hypothesis.
Production records indicate that in normal operation for a certain electronic component, 93% have no faults, 5% have one fault, and 2% have more than one fault. For a random sample of 500 of these components from a week’s output, 458 were found to have no faults; 30, to have one fault; and 12, to have more than one fault. Test, at the 5% level, the null hypothesis that the quality of the output from this week conforms to the usual pattern.
A travel association says the daily lodging costs for a family in the United States is $132. You work for a tourist publication and want to test this claim. You randomly selected 10 U.S. families and find out how much each spent on lodging for one overnight trip. At alpha=0.02, can you reject the travel association's claim? (Adapted from the American Automobile Association) 164 137 142 155 119 104 74 204 148 181 Assume the population is normally distributed.
A glass manufacturing company wanted to investigate the effect of zone 1 lower temperature (630 vs. 650) and zone 3 upper temperature (695 vs. 715) on the roller imprint of glass. Zone 3 Upper Zone 1 Lower Roller Imprint695 630 46695 630 25695 630 47695 630 119695 650 23695 650 26695 650 47695 650 22715 630 96715 630 5715 630 26715 630 81715 650 69715 650 23715 650 5715 650 124 a. At the .05 level of significance, is there an interaction between zone 1 lower and zone 3 upper? Determine the test statistic. Fstat= Determine the p-value. p-value= b. At the .05 level of significance, is there an effect due to zone 1 lower? First, determine the hypotheses. Determine the test statistic. Fstat= Determine the p-value. p-value= c. At the .05 level of significance, is there an effect due to zone 3 upper? First, determine the hypotheses. Determine the test statistic. Fstat= Determine…
A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27 had a history of intrapartum or postpartum infection. Can we conclude that the population proportion with a history of intrapartum or postpartum infection is less than or equal to 0.25. Let alpha = 0.05
In the initial test of the Salk vaccine for polio, 400,000 children were selected and divided into two groups of 200,000. One group was vaccinated with the Salk vaccine while the second group was vaccinated with a placebo. Of those vaccinated with the Salk vaccine, 33 later developed polio. Of those receiving the placebo, 115 later developed polio. Test the hypothesis that the Salk vaccine is effective in lowering the polio rate. Use a=0.01 Apply p-value and classical approach. Show step1-ste03.
Trematodes of the species Euhaplorchis californiensis may infect the California kill fish, Fundulus parvipinnis. Researchers have observed that infected fish spend excessive time near the water surface, where they may be more vulnerable to bird predation. Researchers set up an experiment in a large outdoor tank that stocked with three kinds of killifish, uninfected, lightly infected, and highly infected, and recorded the number of fish that is eaten by birds. State the null and alternative hypothesis
Studies have shown that omega-3 fatty acids have a wide variety of health benefits. Omega-3 oils can be found in foods such as fish, walnuts, and flaxseed. A company selling milled flaxseed advertises that one tablespoon of the product contains, on average, at least 3800 mg of ALNA, the primary omega-3. a) The company plans to conduct a test to ensure that there is sufficient evidence that its claimiscorrect. Tobesafe,thecompanywantstomakesurethatevidenceshowsthe average is higher than 3800 mg. What are the null and alternative hypotheses? b) Suppose, instead, that a consumer organization plans to conduct a test to see if there is evidence against the claim that the product contains an average of 3800 mg per tablespoon. The consumer organization will only take action if it finds evidence that the claim made by the company is false and that the actual average amount of omega-3 is less than 3800 mg. What are the null and alternative hypotheses?
2. A new chemotherapy drug is released to treat leukemia and researchers suspect that the drug may have fewer side effects than the most commonly used drug to treat leukemia. The two drugs have equivalent efficacy. In order to determine if a larger study should be conducted to look into the prevalence of side effects for the two drugs, set up a Mann-Whitney U test at the alpha equals .05 level and interpret its results.Number of Reported Side-EffectsOld Drug 0 1 3 3 5New Drug 0 0 1 2 4 A) We fail to reject H0, which states the two populations are equal at the alpha equals .05 level because the calculated U value of 16.5 is greater than the critical U value of 2.B) We fail to reject H0, which states the two populations are equal at the alpha equals .05 level because the calculated U value of 8.5 is greater than the critical U value of 2.C) We reject H0 in favor of H1, which states the two populations are not equal at the alpha equals .05 level because the calculated U value of 16.5 is…
The contingency table shows the result of a random sample of students by Lika Salmanyan at PCC and the number of hours they spend investing on Robinhood and Acorns by age and gender. At alpha =0.05, can you conclude that age is related to gender when it comes to time spent investing on Robinhood and Acorns. Gender 16-20yrs 21-30yrs 31-40yrs 41-50yrs 51-60yrs 61yrs or older Male 45 170 90 72 45 26 Female 9 30 21 17 10 5 What are the degrees of freedom? What is the critical value? Leave your answers in 3 decimal places The degrees of freedom is and the P- value is .

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