9.2 & 9.3 Homework iSaved!Required informationHelpSaveTo assess the effect of piston ring type and oil type on piston ring wear, three types of piston rings and four types ofwere studied. Three replications of an experiment, in which the number of milligrams of material lost from the ring infour hours of running was measured, were carried out for each of the 12 combinations of oil type and piston ring typeWith oil type as the row effect and piston ring type as the column effect, the following sums of squares were observeSSA 1.293, SSB = 0.9340, SSAB = 0.2485, SSE = 1.7034.How many degrees of freedom are there for error?

To find the degrees of freedom error, multiply the number of categories for variables 1 and 2 by the…

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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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Check my w Required information To assess the effect of piston ring type and oil type on piston ring wear, three types of piston rings and four types of oil were studied. Three replications of an experiment, in which the number of milligrams of material lost from the ring in four hours of running was measured, were carried out for each of the 12 combinations of oil type and piston ring type. With oil type as the row effect and piston ring type as the column effect, the following sums of squares were observed: SSA 1.293, SSB = 0.9340, SSAB = 0.2485, SSE = 1.7034. How many degrees of freedom are there for the effect of piston ring type?
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Alignment Font Clipboard fe L2 E G. H. K A. C D Problem: Customers are complaining about sandwich leagth You are the owner of three local sandwich shops. Recently you've received complaints from customers that their "footlong" sub sandwiches were les than 12 inches long. As a measure of 1 quality assurance, data was collected on all footlong sub sondwiches made over the pcriod of an hour at cach store. Determined which, if any, of your stores are making sub sandwiches that are significantly shorter than 12 inches. You will conduct three t-tests, one for coch store. You want 4 6. to be 95% confident in your recults. (Note. This case is inspired by reality. Scarch the internet for "claims over footlong sub' for a historical perspective and how a company used statistics to incure consistent quality.) 17 10 11 SandwicL Measuremeat: 12 Store 1 Store 2 Store 3 Statistics Store 1 Store 2 Store 3 13 8.8 3.1 9.0 Somple Size Mean (length) 14 11.4 11.6 12.5 15 13.4 13.4 15.1 Variance Standard…
Safari File Edit View History Bookmarks Window Help Wed 7:52 A myopenmath.com + МyOpenMath b My Questions | bartleby A psychologist is concerned about the health of veterans returning from war. She examines 37 veterans and finds that 17% show signs of post-traumatic stress disorder. Later research reveals the truth to be that 29% of veterans show signs of post-traumatic stress disorder. Is 17% a statistic or a parameter? O Parameter Statistic Not enough information to determine Submit Question 00
15. Diameter of Douglas Fir Trees The diameter of the Douglas fir tree is measured at a height of 1.37 meters. The S following data represent the diameter in centimeters of a random sample of 12 Douglas firs in the western Washington Cascades. 156 162 147 173 147 190 130 101 159 113 181 109 Source: L. Winter. "Live Tree and Tree-Ring Records to Reconstruct the Structural Development of an Old-Growth Douglas Fir/Western Hemlock Stand in the Western Washington Cascades." Corvallis, OR: Forest Science Data Bank, 2005. (a) Obtain a point estimate for the mean and standard deviation diameter of a Douglas fir tree in the western Washington Cascades. (b) Because the sample size is small, we must verify that the data come from a population that is normally distributed and that the data do not contain any outliers. The figures show the normal probability plot and boxplot. The correlation between the tree diameters and expected z-scores is 0.982. Use Option 1 or Option 2 to determine if the…
Chi-square independence. A medical paper studies whether the type of medical practice (pediatric, family, or Ob/Gyn) may be associated with the rate at which young female patients complete a course of vaccination for the HPV virus. A sample of 1413 patients yielded the following data: "yes" means the patient completed the course, "no" means she did not: yes no total pediatric 162 353 515 family 106 259 365 Ob/Gyn 201 332 533 total 469 944 1413 At the 5% significance level, do the data support the hypothesis that an association exists between type of medical practice and completion of treatment? For this first problem, calculate the expected frequencies to the nearest integer and place them in the table above, in parentheses, next to the corresponding observed frequencies. Then calculate the test statistic.
I did questions that I already understood I just need help with question b and question C
Several methods of estimating the number of seeds in soil samples have been developed by ecologists. An article gave the accompanying data on the number of seeds detected by the direct method and by the stratified method for 27 soil specimens. Specimen Direct Stratified 1 21 6 2 32 38 3 0 6 4 60 58 5 20 52 6 61 61 7 40 26 8 6 6 9 12 6 10 92 100 11 1 0 12 66 58 13 78 66 14 21 52 Specimen Direct Stratified 15 32 26 16 0 0 17 38 38 18 18 12 19 92 92 20 1 12 21 40 46 22 21 21 23 0 0 24 6 12 25 12 40 26 18 12 27 40 78 Do the data provide sufficient evidence to conclude that the mean number of seeds detected differs for the two methods? Test the relevant hypotheses using ? = 0.05. (Use ?direct − ?stratified.) Find the test statistic. (Round your answer to two decimal places.) t = Find the df. (Round your answer down to the nearest whole number.) df = Use technology to find the P-value. (Round your answer to four…
Student 1:33 PM Wed Apr 21 * 73% O O Q B STA+2023+EC+C12 Home Insert Draw Layout Review View Calibri Bold (Body В I B I U А.. A Read Only - You can't save changes to this file. Save a copу 3. Are health and happiness related? The following data represents the level of happiness and level of health for a random sample of individuals from the General Social Survey. Does the evidence suggest that health and happiness are related. Let a=0.05 Education/Health Excellent Less than High Good Fair Рor 72 202 199 62 School High School Junior College 465 877 358 108 80 138 49 11 Bachelor 229 276 64 12 Graduate 130 147 32 2 ||
Lecture(8.4): Researchers were interested in whether the number of books children carried differed between gender. It was hypothesized that girls would carry more books than boys.Twenty children were recruited and matched based on age and SES..Researchers then collected the number of the age of the appropiate books the children carried. A Summary of the result is given below: Girls 15 7 22 13 26 14 12 11 18 30 Boys 12 10 16 8 17 9 15 10 20 15 Test the hypotheses at (alpha=0.05) level of signifance
2. A researcher had rats engage in a lever-press task for either a small, medium, or larger reward. The number of lever presses was the dependent variable. The data were as follows: Reward Size Small Medium Large 1 4 6 4 3 5 1 4 4 2 5 T = 13 SS = 2.75 T= 6 T= 20 SS = 9 SS = 2 EX2 = 165 a. Do the data indicate that reward size had a significant impact on lever-pressing? Use the hypothesis testing steps & p = .05. Compute any necessary post-hoc tests. b. Compute eta-squared to measure the effect size.
! Required information Check my To assess the effect of piston ring type and oil type on piston ring wear, three types of piston rings and four types of oil were studied. Three replications of an experiment, in which the number of milligrams of material lost from the ring in four hours of running was measured, were carried out for each of the 12 combinations of oil type and piston ring type. With oil type as the row effect and piston ring type as the column effect, the following sums of squares were observed: SSA = 1.293, SSB = 0.9340, SSAB = 0.2485, SSE = 1.7034. Is the additive model plausible? Provide the value of the test statistic and the P-value. (Round the final answer to three decimal places. The test statistic is P-value: 0.001 C

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