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Exhibit 3:  The Ahmadi Corporation wants to increase the productivity of its line workers. Four different programs have been suggested to help increase productivity. Twenty employees, making up a sample, have been randomly assigned to one of the four programs, and their output for a day’s work has been recorded. You are given the results below. At 95% confidence, you need to conduct the ANOVA test to determine whether there is a significant difference in the mean output under the four programs.  Program A Program B Program C Program D 150 150 185 175 130 120 220 150 120 135 190 120 180 160 180 130 145 110 175 175 Part of the ANOVA table is shown below. Source of Variation Sum of Squares d.f. Mean Square Between Groups 8,750     Within Groups       Total 16,350 19  

Essay Question: 1(b). At 95% confidence, what is the margin of error for the population proportion?

In hypothesis testing if the null hypothesis is rejected,

Essay Question:  2(a). What is the standard error of the mean,

Essay Question:  4(b). What is the probability that the sample proportion of voters who will favor Michael will be between 0.7 and 0.74? 

Exhibit 2: The average price of personal computers manufactured by MNM Company is $1,200 with a standard deviation of $220. Furthermore, it is known that the computer prices manufactured by MNM are normally distributed.

Which of the following does not need to be known in order to compute the t-critical value?

Refer to Exhibit 1. The standard deviation of assembly time (in minutes) is approximately

Refer to Exhibit 3. The sum of squares due to error is ______________. 

From a population that is normally distributed, a sample of 25 elements is selected and the standard deviation of the sample is computed. For the interval estimation of µ, the proper distribution to use is the