An experiment to evaluate the effectiveness of the type of snack and children'sperception of satiation was designed so that subjects aged 10 to 13 years wererandomly assigned a snack that was of the exact same ingredients but describeddifferently. The first group had their snack described as healthy and full of vitamins,the second group had their snack described as tasty, the third group were given asnack without any description whatsoever. Thirty minutes after finishing the snack,subjects were asked to rate their hunger on a scale of 1 to 10.The results are summarized in the table:ANOVA: Single FactorSUMMARYGroupsHealthyTastyNo DescriptionANOVASource of VariationBetween GroupsWithin GroupsTotalCount121314SS17.4615462.8974480.35897Sum Average625.1667463.538556 4.0000Variance1.96971.93591.3846df MSFP-value2 8.730769 4.997146 0.01215636 1.74715138Is it reasonable to use the assumption of equal standard deviations when we analyzethese data? Briefly explain your answer.

Answered: Image /qna-images/answer/70372158-0d93-4a73-aa74-1a2d16e23c77.jpg

Answered: An experiment to evaluate 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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Many people take ginkgo supplements advertised to improve memory. Are these over-the- counter supplements effective? In a study, elderly adults were assigned to the treatment group or control group. The 104 participants who were assigned to the treatment group took 40 mg o ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale was administered. Higher scores indicate better memory function. Summary values are given in the following table: N Ginkgo 104 5.7 0.6 Placebo 115 5.5 0.5 Perform the appropriate test to determine if taking 40mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale. > Is the study observational or designed experiment? > Can you conclude association or causation with this type of study? Is this a matched-pair dependent test or two-sample independent test?

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