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In a survey of 240 randomly selected students at the University of California Davis (UCD), 15 said that they were left-handed and 225 said they

In a survey of 240 randomly selected students at the University of California Davis (UCD), 15 said that they were left-handed and 225 said they were right-handed. We would like to know if the proportion of UCD students who are left-handed differs from the national proportion of 0.11.

What is the value of the appropriate test statistic if you want to answer this question by carrying out a test of hypotheses?

Is the proportion of UCD students who are left-handed different from the national proportion of 0.11?

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