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In: Statistics and Probability

A professor using an open source introductory statistics book predicts that 60% of the students will...

A professor using an open source introductory statistics book predicts that 60% of the students will purchase a hard copy of the book, 25% will print it out form the web, and 15% will read in online. At the end of the semester he asks his students to complete a survey where they indicate what format of the book they used. Of the 126 students, 71 said they bought a hard copy of the book, 30 said they printed it out from the web and 25 said they read it online.

Use the framework below to guide your work.

Hypotheses: :     

Ho: The actual distribution follow's the professor's predictions in that p(hard copy) =60%, p(print) = 25% and p(online) = 15%

Ha: The actual distribution does not follow that of the professor's predictions

Blank #1: With the assumption of Ho, the expected count of each cell is _______________ (enter your answer as hard copy E,print E,online E with no extra spaces and no rounding)

Blank #2: The degrees of freedom for the GOF test are _____________.

Blank #3: Test statistic = _________ (round to one decimal place)

Blank #4: p-value = __________ (round to four decimal places)

Blank #5: Test decision: We decide to ___________ Ho (reject or do not reject)

Blank #6: Conclusion back into the words of problem: The evidence __________(favors or does not favor) that the actual distribution does not follow that of the professor's predictions

Solutions

Expert Solution


orchestra answered 2 years ago
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