A psychologist investigated whether there is a difference, on average, in IQ scores for twins. She randomly selected 30 sets of twins from a database and measured their IQs. The mean difference (firstborn – second-born) was 2.1 points with a standard deviation of 7.2 points. Do the data provide a convincing evidence of a difference, on average, in IQ scores for twins?DoPerform the calculations, then complete the conclusion.ConcludeBecause the P-value, which is , is = 0.05, we H0. We convincing evidence of , on average, in IQ scores for twins. A psychologist investigated whether there is a difference,on average, in IQ scores for twins. She randomlyselected 30 sets of twins from a database and measuredtheir IQs. The mean difference (firstborn - second-born)was 2.1 points with a standard deviation of 7.2 points. Dothe data provide a convincing evidence of a difference,on average, in IQ scores for twins?DoPerform the calculations, then complete the conclusion.ConcludeBecause the P-value, which isisHo. Wex = 0.05, weconvincing evidence ofIQ scores for twins.on average, in

given Sample size (n) = 30 Mean difference (x̄) = 2.1 Standard deviation (s) = 7.2

Answered: A psychologist investigated whether…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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Problem 1P

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Question

A psychologist investigated whether there is a difference, on average, in IQ scores for twins. She randomly selected 30 sets of twins from a database and measured their IQs. The mean difference (firstborn – second-born) was 2.1 points with a standard deviation of 7.2 points. Do the data provide a convincing evidence of a difference, on average, in IQ scores for twins?

Perform the calculations, then complete the conclusion.

Conclude

Because the P-value, which is , is
= 0.05, we H₀. We convincing evidence of , on average, in IQ scores for twins.