Suppose That the Time for E-Mail Confirmation of an Online

question 7

Multiple Choice

Suppose that the time for e-mail confirmation of an online purchase is uniformly distributed between 1 and 6 minutes. The probability that an e-mail confirmation arrives
Within 3 minutes is

• A) 0.50
• B) 0.40
• C) 0.60
• D) 0.80
• E) 0.10

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Definitions:

Standard Deviation

A measure of the amount of variation or dispersion of a set of values, indicating how spread out the numbers are from the mean.

Confidence Level

Confidence level refers to a statistical measure expressed as a percentage that represents the frequency at which an estimated parameter would fall within a specified range in repeated sampling.

Breaking Strength

The amount of tension force a material can withstand without rupture, often measured to determine material durability and performance under stress.

Confidence Interval

A range of values derived from sample data that is likely to contain the true value of an unknown population parameter, at a given probability level.