1-a. Draw a statistical control chart and plot the variance data given above. 1-b. Which variances will be investigated?

Principles of Cost Accounting
17th Edition
ISBN:9781305087408
Author:Edward J. Vanderbeck, Maria R. Mitchell
Publisher:Edward J. Vanderbeck, Maria R. Mitchell
Chapter8: Standard Cost Accounting—materials, Labor, And Factory Overhead
Section: Chapter Questions
Problem 13E: Using variance analysis and interpretation Last year, Wrigley Corp. adopted a standard cost system....
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The director of cost management for Odessa Company uses a statistical control chart to help management determine
when to investigate variances. The critical value is 1 standard deviation. The company incurred the following direct-labor
efficiency variances during the first six months of the current year.
January
February
March.
April
May
June
$ 250 F
800 U
700 U
908 U
1,050 U
1,200 U
The standard direct-labor cost during each of these months was $19,000. The controller has estimated that the firm's
monthly direct-labor variances have a standard deviation of $950.
Required:
1-a. Draw a statistical control chart and plot the variance data given above.
1-b. Which variances will be investigated?
Transcribed Image Text:[The following information applies to the questions displayed below.] The director of cost management for Odessa Company uses a statistical control chart to help management determine when to investigate variances. The critical value is 1 standard deviation. The company incurred the following direct-labor efficiency variances during the first six months of the current year. January February March. April May June $ 250 F 800 U 700 U 908 U 1,050 U 1,200 U The standard direct-labor cost during each of these months was $19,000. The controller has estimated that the firm's monthly direct-labor variances have a standard deviation of $950. Required: 1-a. Draw a statistical control chart and plot the variance data given above. 1-b. Which variances will be investigated?
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