The Random Variable X Is the Number of Customers Arriving

question 142

Multiple Choice

The random variable x is the number of customers arriving at the service desk of a local car dealership over an interval of 10 minutes. It is known that the average number of arrivals in 10 minutes is 5.3. The probability that there are less than 3 arrivals in any 10 minutes is:

• A) .0659
• B) .0948
• C) .1016
• D) .1239

Identify the appropriate conditions for using each level of measurement.

Know the definitions and characteristics of nominal, ordinal, interval, and ratio levels of measurement.

Understand the concept of mutually exclusive categories in measurement scales.

Recognize the principles behind scale precision and the hierarchy of measurement scales.

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Definitions:

SRS

Simple Random Sampling (SRS) is a method of selecting individuals from a population in such a way that every set of individuals has an equal chance of being chosen.

Sample Size

The number of observations or data points that constitute a sample drawn from a population for statistical analysis.

Standard Deviation

A measure of the amount of variation or dispersion in a set of values, showing how much each value in the set varies from the mean.

Binomial Populations

Populations for which the outcomes can be classified into two categories (success/failure) and the number of successes in a set number of trials can be predicted.