# Question

Part of quality control is keeping track of what is occurring. The following contingency table shows the number of rejected castings last month categorized by their cause and the work shift during which they occurred.

a. Find the marginal totals.

b. Express the numbers as percentages of the grand total.

c. Express the numbers as percentages of each shift’s marginal total.

d. Express the numbers as percentages of each type of rejection.

e. Draw a bar graph based on the shifts

a. Find the marginal totals.

b. Express the numbers as percentages of the grand total.

c. Express the numbers as percentages of each shift’s marginal total.

d. Express the numbers as percentages of each type of rejection.

e. Draw a bar graph based on the shifts

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