ile Edit History Kudzu ls a plant that was imported to the United States from Ja
ID: 3260157 • Letter: I
Question
ile Edit History Kudzu ls a plant that was imported to the United States from Japan and now covers over seven million acres in have been shown to have beneficial effects on bones. One study used three groups of rats to isofavones from kudzu. One of the outcomes ex plant compare a control group with rats that were fed either a low dose or a high dose of xamined was the bone mineral density in the femur (in grams per square centimeter). Here are the data. Trea I Density (9/cm2) Control 0.229 0.207 0.234 0.220 0.217 0.228 0.209 0.221 Low Dose 0.214 0.220 0.211 0.233 0.219 0.233 0.226 0.228 High Dose 0.255 0.237 0.217 0.206 0.247 0.228 0.245 0.232 0.204 0.220 0.203 0.219 0.218 0.245 0.210 0.216 0.225 0.200 0.208 0.198 0.208 0.203 0.267 0.261 0.221 0.219 0.232 0.209 0.255 (a) Use numerical methods to describe the data. (Round your answers to four decimal places.) Control Low Dose 15 High Dose 15 0.2189 0.2161 02354 15 0.0116 0.0114 0.0191 (b) Examine the assumptions necessary for ANOVA. Summarize your findings. of all the variances are also dose. The normaity of the data can be verified using the 6 sigma approach. Note that all the data lie within three standard deviation of the mean for each ed treatment So, we would assume the data to be normally (c) Run the ANOVA and report the results r answers to two decimal places.) State the Fstatistic and the degrees of freedom. (Round youExplanation / Answer
As Bonferonni is hinted in your question, we need to use adjusted alpha value concept. Alpha is adjusted for indi
Here, alpha = 0.05
Adjusted alpha = 0.05/number of hypothesis = 0.05/3 = 0.01667
[No.of hypothesis= No.of groups * (no.of groups - 1)/2]
t-critical two-tail(0.01667) for (15-1) degrees of freedom= 2.717744957 = 2.71774 ( rounder to 5 decimals)
I think, 2.71774 should be the answer. Please comment back, if it is not right.
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