Research suggests that identical twins have many similarities, such as body weig
ID: 3151839 • Letter: R
Question
Research suggests that identical twins have many similarities, such as body weights, even as adults. A sample of ten sets of identical twins were weighed and had their weights recorded in kilograms. The researcher wishes to test whether there is a statistically significant difference in adult weight between first-born and second-born identical twins.
Given the design of the study and the question of interest, which of the following 4 computer outputs is relevant to use?
A)
B)
C)
D)
***The answer is not A, I just got this one wrong on the online quiz, please help! Thanks!
Explanation / Answer
Research suggests that identical twins have many similarities, such as body weights, even as adults.
A sample of ten sets of identical twins were weighed and had their weights recorded in kilograms.
So, here the samples dependent. That means paired data is available. (I)
The researcher wishes to test whether there is a statistically significant difference in adult weight
between first-born and second-born identical twins.
According to the claim, the hypothesis is non-directionable. So the test is two-tailed. (II)
From both (I) & (II), the required answer need to be (C)
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