A study reported by an electric engineering student considered the effect of X-ray inspection of integrated circuits. The radiation dose were studied as a function of current (in milliamps) and exposure time ( in minutes). The data are shown below. S.N 1 2 3 Radiation dose 4 5 6 7 8 9 10 Current 10 10 10 10 15 15 15 20 20 20 7.4 14.8 28.6 59.2 88.8 11.1 14.8 22.2 29.6 59.2 A: Simple Linear regression model between radiation dose and exposure time. Exposure time 0.25 0.5 1 2 3 10 15 0.5 1 2

A set of n=15 pairs of x and y scores has sx=10, ssy=40, and sp=30. What is the slope for the regression for predicting y from x?

In a fisheries researchers experiment the correlation between the number of eggs in tge nest and the number of viable (surviving ) eggs for a sample of nests is r=0.67  the equation of the regression line for number of viable eggs y versus number of eggs in the nest x is y =0.72x + 17.07 for a nest with 140 eggs what is the predicted number of viable eggs ?

The table below shows the amounts of crude oil​ (in thousands of barrels per​ day) produced by a country and the amounts of crude oil​ (in thousands of barrels per​ day) imported by a​ country, for the last seven years. Construct and interpret a 98​% prediction interval for the amount of crude oil imported by the this country when the amount of crude oil produced by the country is 5,464 thousand barrels per day. The equation of the regression line is y=-1.106x+15,759.462   Oil_produced,_x    Oil_imported,_y5,816    9,3455,741    9,1245,660    9,6325,405    10,0095,155    10,1685,059    10,1055,015    10,055

The slope, b represents * O predicted value of Y when X = 0. O the estimated average change in Y per unit change in X. O variation around the line of regression. O the predicted value of Y.

In calculating a simple regression for average number of drinks consumed (x) and grade point average (y), you get a slope coefficient (b) of -.15 and a y intercept of 2.50. Using the formula Y = a + bX, what would the predicted grade point average be for a student who averaged 1.0 drinks per week?