Güven, Elaimis, Binokay, and Tan (2003) studied the distribution of paw preferen
ID: 3319506 • Letter: G
Question
Güven, Elaimis, Binokay, and Tan (2003) studied the distribution of paw preferences in rats using a computerized food-reaching test. For a sample of n 5144 rats, they found 104 right-handed animals. Is this significantly different from what would be expected if right- and left-handed rats are equally common in the population? Test with a .01.
The null hypothesis and The alternative hypothesis
What are the degrees of freedom?
What is the critical value?
What are the OBSERVED frequencies for right handed rats?
What are the EXPECTED frequencies for right handed rats?
What are the OBSERVED frequencies for left handed rats?
What are the EXPECTED frequencies for left handed rats?
What is the calculated Chi Square test statistic?
What is the correct decision?
accept Ho
reject Ho
reject H1
do not reject Ho
accept Ho
reject Ho
reject H1
do not reject Ho
Explanation / Answer
Ans:
degree of freedom=2-1=1
Test satististic ,calculated chi square=28.44
critical chi square=CHIINV(0.01,1)=6.635
As,test statistic>6.635,we reject null hypothesis.
So,correct decision is:
reject Ho
Observed(O) Expected(E) (O-E)^2/E Right 104 72 14.22 Left 40 72 14.22 Total 144 144 28.44Related Questions
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