When There Is Uncertainty About the Parameters of a Population

question 41

Multiple Choice

When there is uncertainty about the parameters of a population of interest, a t distribution is used instead of a z distribution.Is the t distribution wider or thinner than the z distribution and why?

• A) The t distribution is wider because we are less certain of the findings compared to the z distribution.
• B) The t distribution is thinner because we are less certain of the findings compared to the z distribution.
• C) They produce the same curve because they both use the population mean.
• D) They produce the same curve because they both use the standard deviation of the population.

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