Friday
April 18, 2014

Homework Help: Stats

Posted by Desire on Wednesday, November 25, 2009 at 12:06pm.

To compare the durabilities of two paints for highway use, 12 four-inch wide lines of each paint were laid down across a heavily-traveled road. The order was decided at random. After a period of time, reflectometer readings were obtained for each line. The higher the reading, the greater is the reflectivity and the better is the durability of the paint. The data are as follows:

Paint A: 12.5, 11.7, 9.9, 9.6, 10.3, 9.6, 9.4, 11.3, 8.7, 11.5, 10.6, 9.7

Paint B: 9.4, 11.6, 9.7, 10.4, 6.9, 7.3, 8.4, 7.2, 7.0, 8.2, 12.7, 9.2

What is the 95% confidence interval estimate for the difference between the mean reflectivity reading for Paint A and Paint B? Please complete the blank: “we can be 95% confident that the true difference between the actual means is

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math Figure Logic - ACROSS 1. Forty more than 24- Down ~ Nine more than 3-Down ...
8th grade math - There are three walls in Jordan’s living room. The three walls...
calculus - a road that runs perpendicular to a highway leads to a farmhouse ...
Math - Can anybody help me with this? I dont understand?: Tim paints 1 fence ...
Geometry - a room is 18 feet long and 14 feet wide with walls 10 feet high. If ...
geometry - A grid has lines at 90-degree angles. There are 12 lines in one ...
Physics - A car with bad shocks has a mass of 1500 kg. Before you go for a drive...
Physics - A car with bad shocks has a mass of 1500 kg. Before you go for a drive...
calculus - this is a optimization problem A construction company has been ...
Geometry - A gallon of paint costs $20 and covers 465 square feet. Three coats ...

Search
Members