The Following Display from a TI-84 Plus Calculator Presents a 95

question 33

Multiple Choice

The following display from a TI-84 Plus calculator presents a 95% confidence interval for the difference between two means. The sample sizes are $n _ { 1 } = 8 \text { and } n _ { 2 } = 13$ $\text { Compute the point estimate of } \mu _ { 1 } - \mu _ { 2 } \text {. }$

• A) 123.288
• B) 40.864
• C) 42.032
• D) -1.557

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Definitions:

Standard Error

The statistical metric that represents the dispersion within a sample's distribution, often applied to the average.

Population Proportion

The share or fraction of a population that exhibits a particular attribute or characteristic.

Population Proportion

The ratio of members in a group that have a characteristic of interest to the total number of individuals in the population.

Sample Proportion

The fraction or percentage of the sample that has a particular property or characteristic.