A Statistics Teacher Wants to See If There Is Any $$\begin{array}{l}\text { Today } \quad \text { Five Y ears Ago }\\\begin{array} { l l } 82 & 88 \\112.5 & 54 \\45 & 36\end{array}\end{array}$$

question 53

Multiple Choice

A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago.A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken.You are given the following information. $$\begin{array}{l}\text { Today } \quad \text { Five Y ears Ago }\\\begin{array} { l l } 82 & 88 \\112.5 & 54 \\45 & 36\end{array}\end{array}$$
The 95% confidence interval for the difference between the two population means is

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Definitions:

Competition

Results when members of a species attempt to use a resource that is in limited supply.

Secondary Succession

The process of ecological regeneration that occurs in an environment where a disturbance has destroyed a pre-existing community but left the soil intact.

Sequence of Events

The chronological arrangement or order in which events or steps occur.

Forest

A large area covered predominantly with trees and undergrowth.