Scores on a Test Are Normally Distributed with a Mean $P _ { 81 }$

question 22

Multiple Choice

Scores on a test are normally distributed with a mean of 63.2 and a standard deviation of 11.7 . Find $P _ { 81 }$ which separates the bottom 81 % from the top 19% .

• A) 0.291
• B) 73.5
• C) 0.88
• D) 66.6

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Definitions:

Quarterly Observations

Data points or measurements that are collected or reported every three months within a year.

Seasonal Indexes

Numerical values used to adjust data for seasonal effects, allowing comparison across different times of a year by normalizing seasonal variations.

Quarterly Sales

The total income or revenue generated by sales activities in a quarter, often analyzed to assess financial health and performance trends in businesses.

Cyclical Effect

Periodic fluctuations observed in data or economic activity over regular time intervals, often related to business or economic cycles.