Asimple random sample of size n is drawn from a population that is known to be normally distributed. the sample variance, s squareds2, is determined to be 11.611.6. complete parts (a) through (c). (a) construct a 90% confidence interval for sigma squaredσ2 if the sample size, n, is 20. the lower bound is 7.317.31. (round to two decimal places as needed.) the upper bound is 21.7921.79. (round to two decimal places as needed.) (b) construct a 90% confidence interval for sigma squaredσ2 if the sample size, n, is 30. the lower bound is 7.907.90. (round to two decimal places as needed.) the upper bound is 1919. (round to two decimal places as needed.) how does increasing the sample size affect the width of the interval? the width does not change the width increases the width decreases

Elizabeth believes her company has discriminated against her because her minority coworkers, who are less qualified, have been promoted ahead of her. which agency should elizabeth contact? - national alliance of business- affirmative action council- equal employment opportunity commission- federal trade commission- fair employment practices agency

An important application of regression analysis in accounting is in the estimation of cost. by collecting data on volume and cost and using the least squares method to develop an estimated regression equation relating volume and cost, an accountant can estimate the cost associated with a particular manufacturing volume. consider the following sample of production volumes and total cost data for a manufacturing operation. production volume (units) total cost ($) 400 4000 450 5000 550 5400 600 5900 700 6400 750 7000 compute b 1 and b 0 (to 2 decimals if necessary). b 1 b 0 complete the estimated regression equation (to 2 decimals if necessary). = + x what is the variable cost per unit produced (to 1 decimal)? $ compute the coefficient of determination (to 4 decimals). note: report r 2 between 0 and 1. r 2 = what percentage of the variation in total cost can be explained by the production volume (to 2 decimals)? % the company's production schedule shows 500 units must be produced next month. what is the estimated total cost for this operation (to 2 decimals)? $

Corrective action must be taken for a project when (a) actual progress to the planned progress shows the progress is ahead of schedule. (b) the technical specifications have been met. (c) the actual cost of the activities is less than the funds received for the work completed. (d) the actual progress is less than the planned progress.