Mathematics, 01.10.2019 16:10, tenoi14
Two variables of interest are the dependent variable, infant birth weight in ounces (bwght), and an explanatory variable, average number of cigarettes the mother smoked per day during pregnancy (cigs). the following simple regression was estimated using data on n = 1,388 births, bwght = 119.77 − 0.514 cigs
(i) what is the predicted birth weight when cigs = 0? what about when cigs = 20? comment on the difference.
(ii) does this simple regression necessarily capture a causal relationship between the child’s birth weight and the mother’s smoking habits? explain.
(iii) to predict a birth weight of 125 ounces, what would cigs have to be?
Answers: 3
Mathematics, 21.06.2019 22:30, renaudciera
Use the following statements to write a compound statement for the conjunction or disjunction. then find its truth value. p: an isosceles triangle has two congruent sides. q: a right angle measures 90° r: four points are always coplanar. s: a decagon has 12 sides. a) a right angle measures 90° or an isosceles triangle has two congruent sides; true. b) a right angle measures 90° and an isosceles triangle has two congruent sides; true. c) a right angle measures 90° and an isosceles triangle does not have two congruent sides; false. d) a right angle measures 90° or an isosceles triangle does not have two congruent sides; true.
Answers: 3
Mathematics, 22.06.2019 01:30, bethanybowers4986
Jahdzia wears her winter coat when the temperature is colder than -4 degrees celsius. write an inequality that is true only for temperatures (t) at which jahdzia wears her winter coat.
Answers: 3
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