Incidents Involving Serious Engine Problems on the DD-340 Aircraft Are

question 131

Multiple Choice

Incidents involving serious engine problems on the DD-340 aircraft are rare.They occur at an average rate of 3.0 per year (or .25 incidents per month) .Assume all Poisson conditions are met.Use the exponential distribution to determine the probability that no incidents occur during the next 6 months.

• A).1887
• B).1369
• C).1984
• D).2231
• E).1537

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Definitions:

Margin of Error

The amount of error allowed in the results of a statistical survey, expressed as a percentage and indicating the confidence in the results.

Mean Weight

The average mass of objects or individuals, calculated by summing their weights and dividing by the number of objects or individuals.

Sample

A subset of individuals, items, or data taken from a larger population, used to make inferences about the whole population.

Confidence Interval

A span of numbers obtained from sampled data which probably encompasses the value of a not yet known parameter of the overall population.