The two indenters result in different measurements.

Reference no: EM13155765

The manufacturer of hardness testing equipment uses steel-ball indenters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of differences between the two types of indenters, it is suspected that the two methods will produce different hardness readings. The metal specimens to be tested are large enough so the two indentions can be made. Therefore, the manufacturer uses both indenters on each specimen and compares the hardness readings. Construct a 95% confidence interval to judge whether the two indenters result in different measurements.
Note: A normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers.
Construct a 95% confidence interval to judge whether the two indenters result in different measurements, where the difference are computed as "diamond minus steel-ball."
The 95% confidence interval is (________,_______)
Data Table:
Specimen 1 2 3 4 5 6 7 8 9
Steel ball 51 57 61 70 68 54 65 51 53
Diamond 53 56 61 74 69 56 68 51 56

Reference no: EM13155765

Questions Cloud

State the direction of the alternative : State the direction of the alternative hypothesis used to test that the demand function is downward sloping. Type gt (greater than), ge (greater than or equal to), lt (less than), le (less than or equal to) or ne (not equal to) as appropriate in the ..

Explain what percentage of the spheres are copper : The total volume of both metals is measured by the displacement of water to be 426 and the total mass is 4.40 . What percentage of the spheres are copper?

What impact would this action have on the economy : Suppose the Fed decided to purchase $50 billion worth of government securities in the open market. What impact would this action have on the economy? Specifically, answer the following questions:

Calculate the ph of the rainwater : The atmospheric sulfur dioxide concentration over a certain region is 0.12 ppm by volume. Calculate the pH of the rainwater due to this pollutant. Assume the dissolution of SO2 does not affect its pressure.

The two indenters result in different measurements. : The manufacturer of hardness testing equipment uses steel-ball indenters to penetrate metal that is being tested. However, the manufacturer thinks it would be better to use a diamond indenter so that all types of metal can be tested. Because of diffe..

Using a manova, try to ascertain : Using a MANOVA, try to ascertain which version of the drug (A, B or C) shows the most promise. Perform the following analyses, and paste the SPSS output into your document.1. Exploratory Data Analysis.

Budgeted cash disbursements : The invoice cost for merchandise purchases represents 75% of the sales price. All purchases are paid in cash. How much are the budgeted cash disbursements for December?

What is the t score if standard deviation is given : If 15 subjects take a pre-test and a post-test with a mean change score of 1.5, and if the standard deviation of the comparison distribution is calculated to be .5, what is the t score?

How many moles of n2 are present at equilibrium : The following reaction is investigated (assume an ideal gas mixture): 2N2O(g) + N2H4(g)-> 3N2(g) + 2H2O(g) Initially there are 0.10 mol N2O and 0.25 mol N2H4, in a 10.0 L container. If there are 0.06 mol of N2O at equilibrium, how many moles of N..

User Account

All Pages