An experiment was conducted in laug to tesune+ner bcing n the prence os stranger

Question

An experiment was conducted in laug to tesune+ner bcing n the prence os strangers offkets how uong it will take someone to go +0 tne aid of ano +Her stra nger in distress. In this, eacH ubjr wa est in a waiting room eitner alone, wim 2 strangers presenti or witn 5tranger, presen+. A retarcner would preencl to suffer an ankie inury in ne room wext door and caltl out for heip. The amount oime it tookci sond) fr cac subjeur t o come to tne aidf the resear c ner was ccorcled, and the toult are belou 70 ) wnat docs 5SE qvantl cancept vallyLexplain snas wonk 1 2) The overall ANOVA F- two-sampte kst is significant . Here are the p-ualwa cacrt possib +-+cs+ , would tht statistial deu isi0n we perform dia, odon perroni correct, Gn? Griefly Justify yan onowrtr )Nhat Undtsirable outcorne does the bonPerroni Corrstin attempt to "corotn

Explanation / Answer

following information has been generated using ms-excel

x-=sum(xj--x-)/sum(nj)=476.2/14=34.014

(a) SSE=sum((nj-1)sj2)=209.24

(b) there are is less chance to be difference of two means will be significant as p-value will be numerically less

(c) the Bonferroni correction could be extremely conservative, leading to a high rate of false negatives.

xj- sj nj (nj-1)sj2 nj*xj- xj--x- nj(xj--x-)2 26.8 5.58 4 93.4092 107.2 -7.214285714 208.183673 33.6 2.51 5 25.2004 168 -0.414285714 0.85816327 40.2 4.76 5 90.6304 201 6.185714286 191.315306 sum 14 209.24 476.2 400.357143

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