To compare three brands of computer keyboards, four data entry specialists were randomly selected. Each specialist used all three keyboards to enter the same kind of text material for 10 minutes, and the number of words entered per minute was recorded. The data obtained are given in the table below.  Using these data, SST = 392.6667, SSB = 143.54833, and SSE = 2.6667.

                                                      Keyboard Brand

       Data Entry Specialist               A       B       C

                   1                                     77     67     63

                   2                                    71     62     59

                   3                                    74     63     59

                   4                                     67     57     54    

 

Use Tukey simultaneous 95 per cent confidence intervals to make pairwise comparisons of the keyboard brand effects on the mean number of words entered per minute.  Which keyboard brand maximizes the mean number of words entered per minute?

Posted Date: 3/8/2013 4:07:20 AM | Location : United States

Ask an Expert

Related Discussions:- Statistics assignment, Assignment Help, Ask Question on Statistics assignment, Get Answer, Expert's Help, Statistics assignment Discussions

Write discussion on Statistics assignment
Your posts are moderated

Write your message here..

Related Questions

Vital statistics, How vital statistics are affects on our human life How vital statistics are affects on our human life

Compute the sample mean and sample standard deviation, We want to investiga... We want to investigate the income data.  In the Excel file Midterm  Data.xls there is a tab labeled "Income Data 2006".  The data in the tab is the income reported by 400 people in

Descriptive statistics, Descriptive Statistics : Carrying out an extens... Descriptive Statistics : Carrying out an extensive analysis the data was not a subject to ambiguity and there were no missing values.  Below are descriptive statistics that hav

Calculate mean and standard deviation, Select and generate your assignment ... Select and generate your assignment portfolio. The S&P/ASX 200 index is comprised of several sub-indices, including the following: 0) XPJ: The S&P/ASX 200 A-REIT Index 1) XDJ

Multiple correspondence analysis, Correspondence analysis is an exploratory... Correspondence analysis is an exploratory technique used to analyze simple two-way and multi-way tables containing measures of correspondence between the rows and colulnns of an

Explain ridge regression, Using log(x1), log(x2) and log(x3) as the predict... Using log(x1), log(x2) and log(x3) as the predictors, do pair wise scatterplots of all pairs of variables (including the response) and comment (use the pairs function). Do you thin

Association of attributes, In an examination 600 candidates appeared, boys ... In an examination 600 candidates appeared, boys outnumbered girls by 16% of all candidates. number of passed candidates exceeded the number of failed candidates by 310. Boys failin

Sample, You want to know the thoughts of air travelers in fields such as ti... You want to know the thoughts of air travelers in fields such as tickets, comffort, safety, securuty, services and economic growth. You are given a database and 20 questions to ask

Package design ratings, Consider the sample of 60 package design ratings gi... Consider the sample of 60 package design ratings given in the table below.                                    A Sample of Package Design Ratings                 (Composite S

Estimation of seasonal variation, how can i calculate seasonal index? how can i calculate seasonal index?