A Random Sample of N Measurements Was Selected from a Population

question 63

Multiple Choice

A random sample of n measurements was selected from a population with unknown mean µ and known standard deviation ?. Calculate a 95% confidence interval for µ for the given situation.
Round to the nearest hundredth when necessary.

$\mathrm { n } = 100 , \overline { \mathrm { x } } = 74 , \sigma = 25$

• A) \(74 \pm 0.49\)
• B) \(74 \pm 4.11\)
• C) \(74 \pm 4.9\)
• D) \(74 \pm 49\)

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Definitions:

Free Recall

A process in memory recall where information is retrieved without being cued, recalling events or facts spontaneously.

Serial Recall

The process of recalling items or events in the order in which they occurred or were presented.

Savings

Monetary funds that are set aside or stored for future use or emergencies, typically earning interest in a financial institution.

Recognition

The cognitive process of identifying previously encountered objects, events, or people, indicating the ability to remember them.