A researcher wishes to determine if vitamin E supplements could increase cognitive abilityamong elderly women. In 1999 the researcher recruits a sample of elderly women age 75-80.At the time of the enrolment into the study, the women were randomized to either takeVitamin E, or a placebo for six months. At the end of the six month period, the women weregiven a cognition test. Higher scores on this test indicate better cognition. The mean andstandard deviation of the test scores of women who took vitamin E supplements was 27 and6.9 respectively. The mean and standard deviation of the test scores of the 90 women whotook246.2placebosupplementswasandrespectively.●●●●Compute a 95% confidence interval for the mean difference incognition test scores between Vitamin E and placebo groups.Whatstatistical test would you perform to compare the meanscores?Are there limitations to this study for drawing conclusions aboutwhether vitamin E can enhance cognitive ability in elderlywomen?What would you conclude from these study results?

Here, M1=27, sd1=6.9 and M2=24, sd2=6.2 n1=n2=90=n Pooled sd, sp=sqrt((6.92*89+6.22*89)/(90+90-2))…

Answered: A researcher wishes to determine if…

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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