A Psychology Instructor Gave a Five-Question True-False Quiz to Her

question 99

Multiple Choice

A psychology instructor gave a five-question true-false quiz to her class of 178 students. ) $$\begin{array} { l | c c c c c c } \text { Number Correct } & 0 & 1 & 2 & 3 & 4 & 5 \\\hline \text { Observed } & 8 & 30 & 56 & 48 & 26 & 10\end{array}$$ The instructor thinks that the students may have answered the questions by guessing, so that the probability that any given answer is correct is 0.5. Under the null hypothesis, the number
Of correct answers has a binomial distribution with 5 trials and success probability 0.5. Perform a chi-square test of this hypothesis. Can you reject $H _ { 0 }$ at the $\alpha = 0.01$ level?

• A) Yes
• B) \(\mathrm { No }\)

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Definitions:

Contract

A legally binding agreement between two or more parties that outlines rights and duties towards one another.

Voidable

A legal term describing a transaction or agreement that may be annulled or voided at the discretion of one party.

Good Faith Purchaser

A purchaser who buys without notice of any circumstance that would put a person of ordinary prudence on inquiry as to whether the seller has valid title to the goods being sold.

Title

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