Use the following to answer the question. A multiple linear regression model is
ID: 2948480 • Letter: U
Question
Use the following to answer the question.
A multiple linear regression model is used to predict the mid-upper arm circumference (MUAC) of Ethiopian teenagers. The explanatory variables in the model are height (cm) and househould income, measured in Ethiopian currency (the birr).
Residuals:
Min 1Q Median 3Q Max
-5.188 -1.851 -0.012 1.581 5.796
Coefficients:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 6.884958 5.713208 1.205 0.23420
height_cm 0.101084 0.036811 2.746 0.00852
hhincome -0.000730 0.001388 -0.526 0.60142
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Residual standard error: 2.459 on 47 degrees of freedom
Multiple R-squared: 0.1397,Adjusted R-squared: 0.1031
F-statistic: 3.817 on 2 and 47 DF, p-value: 0.0291
Question: How many individuals were included in this analysis?
a. 47
b. 48
c. 49
d. 50
e. 51
Explanation / Answer
Degrees of freedom for Regression = 2 ,
Degrees of freedom for residual = 47
Degrees of freedom for total = 47+2 = 49
df (total) = N-1 = 49
Therefore, N = 49+1 = 50
The total number of individuals in this analysis are 50
Answer: Option d) 50
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