An independent mail delivery service wants to study factors that affect the daily gas usage of its delivery trucks. using data collected from different trucks on various days, a company analyst uses a software to fit a regression model of the form:

ŷ=49.2+6.1x1-2.6x2+4x3+0.03x4

where
y= volume of gasoline used (in gallons)
x1= weight of truck (in tons)
x2= tire pressure (in psi, pounds per square inch)
x3 =weight of initial package load (in hundreds of pounds)
x4= total distance driven while delivering packages (in miles)

answer the following questions for the interpretation of the coefficient of x, in this model.
a. holding the other vartables fixed, what is the average change in dally fuel used for each additional hundred pounds of package weight?
b. is this change an increase or a decrease?

Jose is going to use a random number generator 500500 times. each time he uses it, he will get a 1, 2, 3,1,2,3, or 44.

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Write the contrapositive of the conditional statement. determine whether the contrapositive is true or false. if it is false, find a counterexample. a converse statement is formed by exchanging the hypothesis and conclusion of the conditional. a) a non-converse statement is not formed by exchanging the hypothesis and conclusion of the conditional. true b) a statement not formed by exchanging the hypothesis and conclusion of the conditional is a converse statement. false; an inverse statement is not formed by exchanging the hypothesis and conclusion of the conditional. c) a non-converse statement is formed by exchanging the hypothesis and conclusion of the conditional. false; an inverse statement is formed by negating both the hypothesis and conclusion of the conditional. d) a statement not formed by exchanging the hypothesis and conclusion of the conditional is not a converse statement. true