Chapter 6, Section 4-D, Exercise 180

Use the formula to find the standard error of the distribution of differences in sample means,x1-x2.

Samples of size105 from Population1with mean92and standard deviation10and samples of size90from Population2with mean70and standard deviation18

Round your answer for the standard error to two decimal places.

standard error=__________

Chapter 9, Section 1, Exercise 001

Use the computer output to estimate the intercept0and the slope1.

The regression equation isY=24.1+3.54X.

Predictor Coef SE Coef T P

Constant 24.085 5.202 4.63 0.000

X 3.542 0.5334 6.64 0.000

Intercept0: __________

Slope1: __________