The Monthly Electrical Utility Bills of All Customers for the Far

question 63

Multiple Choice

The monthly electrical utility bills of all customers for the Far East Power and Light Company are known to be distributed as a normal distribution with mean equal to $87.00 a month and standard deviation of $36.00. If a statistical sample of n = 100 customers is selected at random, what is the probability that the mean bill for those sampled will exceed $75.00?

• A) -0.33
• B) Approximately 0.63
• C) About 1.00
• D) 3.33

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Definitions:

Sequences

An ordered list of numbers, objects, or events that follow a particular pattern or rule.

Meta-analysis

A statistical method that integrates the findings of various research studies to reach an overall conclusion.

Replication

The process of repeating a study or experiment to determine whether the original findings can be duplicated and are reliable.

Case Study

A research method involving an up-close, in-depth, and detailed examination of a particular case or cases, within a real-world context.