P&S Lesson 4.4 Practice

Front

What is the mean time in an SRS of 100 calls to a customer service line?

Back

12.5 minutes.

Front

Can the mean time for all callers to the customer service line be assumed to be 12.5 minutes?

Back

No, the mean time for all callers may differ from 12.5 minutes due to sampling error or variability in hold times.

Front

In an SRS (Simple Random Sample), are individuals selected with replacement?

Back

False.

Front

What is sampling variability?

Back

Sampling variability is the variation in sample statistics from different samples drawn from the same population.

Front

What is inference in statistics?

Back

Inference is the act of deriving logical conclusions from premises known or assumed to be true.

Front

Does increasing the sample size help to reduce sampling variability?

Back

True.

Front

What is a Simple Random Sample (SRS)?

Back

A Simple Random Sample is a subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.

Front

What is the impact of sampling error on statistical conclusions?

Back

Sampling error can lead to incorrect conclusions about the population if the sample is not representative.

Front

How does sample size affect the reliability of statistical estimates?

Back

Larger sample sizes generally lead to more reliable estimates and reduced variability.

Front

What is the difference between a population and a sample?

Back

A population includes all members of a specified group, while a sample is a subset of the population.