Sex differences for people with an intellectual disability. Yen, Lin, and Chiu (

Question

Sex differences for people with an intellectual disability. Yen, Lin, and Chiu (2013) compared the number of male and female people with an intelligence disability [ID] to the proportion of males and females in the general population In their study, they reported that the number of males with an ID was 49,451 and the num- ber of females with an ID was 45,935. The researchers identified that the proportion of males and females in the general population was 50.8% males and 49.2% females. Usin these proportions to compute expected f quencies, conduct a chi-square goodness-of fit test and decide whether to retain or reject the null hypothesis 29. SSUes

Explanation / Answer

test statistics, chi-square = sum((Oi-Ei)^2/Ei) = 41.52

p-value = 0.000

As p-value is less than the significance level of 0.05, we reject null hypothesis

Oi Ei (Oi-Ei)^2/Ei Males 49451 48456.088 20.42777138 Females 45935 46929.912 21.09208915

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