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 and the number of words entered per minute was recorded. The obtained data are given in the table below. Data entry specialist Keyboard 1 3 4 brand A 77 71 74 67 B 67 62 63 57 C 63 59 59 54 For this situation a. What type of design was employed in this experiment?- b. Identify the response variable for this experiment. с. Identify the factor that should influence the response and list the levels of the factor. d. What general name can you give to each of groups of data entry specialists? e. If MSE = 0.445, find individual 95% confidence interval for the difference in mean number of words typed per minute using keyboard A and keyboard B.

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Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.