A Statistics Professor Receives an Average of Five E-Mail Messages

question 114

Multiple Choice

A statistics professor receives an average of five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have no messages?

• A) 0.0067
• B) Zero
• C) 0.0335
• D) Impossible to have no messages

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Definitions:

Direct Material Price Variance

The difference between the actual cost of direct materials and the standard cost multiplied by the quantity purchased, used in variance analysis for cost control.

Actual Price Per Pound

The real cost of a commodity or material expressed on a per pound basis.

Standard Price Per Pound

A predetermined cost set for a pound of material, used in budgeting and costing to assess efficiency and variances in purchasing or production.

Total Direct Materials Cost Variance

The difference between the actual cost of direct materials used in production and the expected (or standard) cost.