In an experiment to determine the effect of catalyst on the yield of a certain reaction, theyieldsforeach of four catalystsweremeanreactionsrunwithX = 89.88, X = 89.51, X = 86.98, and X, = 85.79. Assume that five runs were madewith each catalyst.If MSE = 3.85, compute the value of the F statistic for testing the null hypothesis thatall four catalysts have the same mean yield. Can this null hypothesis be rejected at the5% level?%3Da.b. Use the Tukey-Kramer method to determine which pairs of catalysts, if any, may beconcluded to differ at the 5% level.

Answered: Image /qna-images/answer/6a7242c7-422d-4cbd-abf8-35472a4d96c2.jpg

Answered: In an experiment to determine the…

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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In a random sample of 1022 Canadian adults, 480 think that the Canadian government is doing too little to protect the environment. In another random sample of 1008 Canadian adults taken 10 years ago, 514 think that the Canadian government is doing too little to protect the environment. At a=0.10, can you reject the claim that the proportion of US adults who think that the Canadian government is doing too little to protect the environment hasn't changed?
A study of 200 randomly selected occupants in passenger cars and 250 randomly selected occupants in pickup trucks show that 182 of occupants in passenger cars and 208 of occupants in pickup trucks wear seat belts. At α=0.10, can you reject the claim that the proportion of occupants who wear seatbelts is the same for the passenger cars and pickup trucks?
How would I solve this assuming the population variances are equal?
In running a regression of the retunrs of stock XYZ against the returns on the market, the Std for the returns of stock XYZ is 20% and that of the market returns is 15%. If the estimated beta is found to be 0.75 : What is the correlation between the returns of the stock XYZ and those of the market ?
Q5: The theory that resistance by mosquitoes to an insecticide is due to a single dominant gene has been examined. Homozygous resistant mosquitoes were crossed with homozygous susceptible mosquitoes to give A heterozygous population. These were crossed to the homozygous susceptible population. Of this back cross progeny 465 were exposed to the insecticide, 264 died. Is the percentage killed significantly different to the percentage predicted by the model?
A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x, be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x, be the empathy = 68.36. Another random sample of 31 fathers gave score of a father. A random sample of 37 mothers gave a sample mean of x, X, = 60.06. Assume that o, = 11.55 and o, = 11.45. (a) Let u, be the population mean of x, and let u, be the population mean of x,. Find a 99% confidence interval for u, - Hz. (Round your answers to two decimal places.) lower limit upper limit (b) Examine the confidence interval and explain what it means in the context of this problem. Does the confidence interval contain all positive, all negative, or both positive and negative numbers? What does this tell you about the relationship between average empathy scores for mothers compared with those for fathers at the 99% confidence level? Because the interval contains only…
A researcher conducts a two-year study comparing the number of cavities in a group of 30 randomly selected young children from the community before and after the application of fluoride to test if there is a decrease in the number of cavities. This is an example of a/an: Independent-samples t test or Dependent-samples t test?
A sample of 25 individuals was taken to investigate the relationship between their annual income and number of years of education. The Pearson's correlation coefficient (r) was calculated to be 0.6. Test the hypothesis at a significance level of 0.01 that the population correlation coefficient is different from 0.
A researcher collects data from 65 people to see if there is a relation between anxiety and memory in high school students. The researcher finds the following descriptive statistics: Xbar= 25.5, sX = 4.3, Ybar = 15.6, sY = 3.2, SSX = 198.4, SSY = 1152.3, and SP = 220.4. Test for a significant relation at α =0.05.
Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentrations increasing progressively up the food chain (fruit < vegetables < cereals < nuts < corpse). Geochemical surveys take soil samples to determine phosphorous content (in ppm, parts per million). A high phosphorous content may or may not indicate an ancient burial site, food storage site, or even a garbage dump. Independent random samples from two regions gave the following phosphorous measurements (in ppm). Assume the distribution of phosphorous is mound-shaped and symmetric for these two regions. REGION I:X1;N1=15 857 1,551 1,230 875 1,080 2,330 1,850 1,860 2,340 1,080 910 1,130 1,450 1,260 1,010 REGION II:X2;N2=14 538 812 790 1,230 1,770 960 1,650 860 890 640 1,180 1,160 1,050 1,020 (a) Use a calculator with mean and standard deviation keys to verify that x1, s1, x2, and s2. (Round your answers to four decimal places.) x1= ppm s1= ppm x2= ppm s2= ppm…
To evaluate the coagulation effects of three drugs, 30 healthy volunteers were randomly assigned into 3 groups and injected with different drugs. Their relevant coagulation times were measured as follows A(group=1): 36.8 34.4 34.3 35.7 33.2 31.1 34.3 29.8 35.4 31.2B(group=2): 40.0 35.5 36.7 39.3 40.1 36.8 33.4 38.3 38.4 39.8C(group=3): 32.9 37.9 30.5 31.1 34.7 37.6 40.2 38.1 32.4 35.6Questions: ① If you want to evaluate whether the coagulation effects of the three drugs are different, which method should be used? and what are the model assumptionsfor the application of this method?② Compare the difference of the coagulation effects among three drugs by SPSS,present the main results and make interpretation.③ Make pairwise comparisons of the efficacy of the three drugs, write out the method of pairwise comparison you adopted (just write one method) and the corresponding p-values.

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