The Time for a Professor to Grade a Homework in Statistics

question 54

Multiple Choice

The time for a professor to grade a homework in statistics is normally distributed with a mean of 12.6 minutes and a standard deviation of 2.5 minutes. What is the probability that randomly selected homework will require more than 12 minutes to grade?

• A) 0.8023
• B) 0.5948
• C) 0.6664
• D) 0.5040

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Definitions:

Vertical Axis

The y-axis in a graph or chart, which is typically used to represent the range of one of the variables in the data.

Phillips Curve

An economic theory that suggests an inverse relationship between the rate of inflation and the unemployment rate.

Aggregate Demand

The overall requirement for products and services in an economic setting, identified at a specific price level and time period.

Short-Run Aggregate Supply

The total supply of goods and services that firms in an economy plan on selling during a short-term period, assuming some input prices are fixed.