Use the Empirical Rule to Describe Data That Are Bell $95 \%$

question 119

Multiple Choice

Use the Empirical Rule to Describe Data That Are Bell Shaped
-A severe drought affected several western states for 3 years. A Christmas tree farmer is worried about the drought's effect on the size of his trees. To decide whether the growth of the trees has been retarded, the farmer decides to take a sample of the heights of 25 trees. Typically trees of this age have a mean height of 65 inches with a standard deviation of 9 inches. Assuming the distribution is bell shaped, where do you expect middle $95 \%$ of the tree heights to fall?

• A) between 47 and 83 inches tall
• B) between 56 and 74 inches tall
• C) between 38 and 92 inches tall
• D) over 56 inches tall

Understand how standard cost systems work in manufacturing settings.

Identify the budgeted versus actual performance differences.

Understand the role of machine-hours in costing and variances analysis.

Understand and apply the concept of standard costing in manufacturing operations.