Consider a Situation in Which Chris Predicts That an Impending

question 13

Multiple Choice

Consider a situation in which Chris predicts that an impending drainage connection will alter the number of fish in a set of six small lakes. She uses a large net (a seine) and counts the number of fish and obtains the values shown. Based on the 95% confidence interval for the difference in the mean values, what do you predict the results of a paired t-test to be?
?
Number of fish caught in six seines before and after drainage connection.

$\begin{array}{lll}\underline {\text {Vial } }&\underline {\text { Before } }&\underline {\text { After } }\\1 & 24 & 20 \\2 & 35 & 31 \\3 & 64 & 59 \\4 & 51 & 52 \\5 & 25 & 28 \\6 & 48 & 39\end{array}$ ?

• A) Fail to reject the null hypothesis, the storm did not seem to change the number of fish in the lakes.
• B) Fail to reject the null hypothesis, the storm seemed to reduce the number of fish in the lakes.
• C) Reject the null hypothesis, the storm did not seem to change the number of fish in the lakes.
• D) Reject the null hypothesis, the storm seemed to reduce the number of fish in the lakes.

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