Step 9(b) Use Fisher's LSD procedure to test whether there is a significant difference between the means for treatments A and B, treatments A and C, and treatments B and C. Use α = 0.05.A hypothesis test for the population of treatment means can lead to the conclusion that not all the population means are equal, but it does not indicate which population means may differ. Fisher's least significant difference, LSD, procedure can be used topinpoint where these differences occur.The test statistic will be calculated as the absolute value of the difference between two sample means, x₁ - x;. This test statistic will be compared to the value of LSD, the formula of which is given below. The variable t/2 is based on a t distribution withn, - k degrees of freedom with a significance level of a, MSE is the mean square error, n, is the number of observations for population i, and n, is the number of observations for population j./ MSE (171, + 121,)LSD = ta/2VA significance level of a = 0.05 was specified, sota/2 = 490233X= 0.025. This will be the upper tail area of the t distribution with n - k = 12 degrees of freedom. Use technology to find t/2/ rounding the result to three decimal places.

When there are more than two groups that have to compare about mean then the test used is ANOVA. It…

Answered: (b) Use Fisher's LSD procedure to test…

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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If a treatment is expected to decrease scores on a variable for which the mean is expected to be µ = 50, what is the null hypothesis?
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Polyunsaturated fatty acids in the diet favorably affect several risk factors for cardiovascular disease. The principal dietary polyunsaturated fat is linoleic acid. Suppose we randomly selected twelve adults for our study. We took their blood pressure measurements (systolic blood pressure) at the start and recorded them for each adult. Then we placed required these adults to consume 23g/day of safflower oil which is high in linoleic acid for four weeks. At the end of the four weeks, we took another systolic blood pressure(SBP) measurement. The paired data is provided below: Subject 1 2 3 4 5 6 7 8 9 10 11 12 Baseline SBP 119.67 100.00 123.56 109.89 96.22 133.33 115.78 126.39 122.78 117.44 111.33 92.39 1-month SBP 117.33 98.78 123.83 107.67 95.67 128.89 113.22 121.56 126.33 110.39 107.00 93.06 Use the appropriate nonparametric test at alpha level of 0.05, to test whether the diet heavy in linoleic acid increases systolic blood pressure (SBP).
The Crude Mortality Rate in Community A was higher than the Crude Mortality Rate in Community B, but the Age-Adjusted Mortality Rate was higher in Community B than in Community A. What does this information indicate? * O The investigators made a calculation error. No inferences can be made about the comparative age of the populations from these data. O The population of Community B is, on the average, older than that of Community A. O The population of Community A is, on the average, older than that of Community B.
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Is there a difference between men and women when it comes to seeking preventative healthcare? At the a = 0.01 level of significance, test the claim that the proportion of those who have had a wellness visit with their physician in the past year is the same for men and women. Let pp represent the proportion of females who have had a wellness visit with their physician in the past year and pM represent the proportion of males who have done the same. Which would be correct hypotheses for this test? O Ho:PF = PM, H1:PF > PM O Ho:PF + PM, H1:PF > PM O Ho:PF = pM, H1:pF < pM O Ho:PF = PM, H1:PF # PM In a random sample of 331 females, 306 have had a wellness visit with their physician in the past year. In a random sample of 272 males, 237 have had a wellness visit with their physician in the past year. Find the test statistic (2 decimal places): Give the P-value (4 decimal places - if less than 0.001 answer 0): Which is the correct result: O Reject the Null Hypothesis O Do not Reject the Null…
In a certain jurisdiction, all students in Grade Three are required to take a standardized test to evaluate their math comprehension skills.The file contains these data resulting from a random sample of n=30 schools within this jurisdiction. From these data you wish to estimate the model Yi=β0+β1Xi+ei where Xi is the percentage of Grade Three students in School i who live below the poverty line and Yi is the average mathematics comprehension score for all Grade Three students in the same school, School i. The observed data for the X variable is labled perbelowpoverty and the observed data for the Y variable is labeled mathscore in the file.Import (either hand type or load the file) data into R Studio, then answer the following questions based on the data.(a) Create a scatterplot of the data. What can you say about the nature of the relationship between the percentage of Grade Three students living below the poverty line in a certain school and the school's average Grade Three…

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