ghari112345

11.05.2021 • 

Mathematics

Since obtaining measurements of the human brain is difficult with living subjects, Gladstone (1905) used cadavers to investigate if there was a relationship between a subject's head size (in cubic centimeters) and his or her brain weight (in grams). This linear regression model was fit using 50 randomly selected cadavers from Gladstone's study, where X is the predictor variable head size and Yˆ is the predicted response variable brain weight. The standard error of the slope coefficient for this model, SEb, is 0.0233. Yˆ=342.0134+0.2585X

Using this regression line, suppose Gladstone wishes to conduct a two‑tailed t ‑test to test the hypothesis that subjects with larger head sizes will have either smaller or larger brain weights. Let =0.05 and assume that all of the necessary conditions are met for this linear regression model. Let β represent the slope of the population regression line.

Required:
Compute the t-statistic and its corresponding.

Ответ:

Lovelybunny321

15.09.2021

Mathematics

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12.
3x - y = 7
when x = -5
3(-5) - y = 7
-15 - y = 7
-15 - 7 = y
-22 = y...so this one is (-5,-22)

when x = 0
3(0) - y = 7
-y = 7
y = -7so this one is (0,-7)

when x = 4
3(4) - y = 7
12 - y = 7
-y = 7 - 12
-y = - 5
y = 5...so this one is (4,5)

13. u r correct on these

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