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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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zar zar
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4 years ago
The average American sees 3.9 movies at the theater each year. A curious student polls 30 friends and family over the course of a week. He finds that his friends have seen an average of 4.5 movies with a standard deviation of 1.2 movies.

Does this sample provide evidence that people are attending the movies more often? Provide a complete significance test to support your answer.
Textbook 
Stats: Modeling the World

Stats: Modeling the World


Edition: 4th
Authors:
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Lori734Lori734
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4 years ago
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zar Author
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#2
4 years ago
Thanks for your help!
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#3
4 years ago
The average American sees 3.9 movies at the theater each year. A curious student polls 30 friends and family over the course of a week. He finds that his friends have seen an average of 4.5 movies with a standard deviation of 1.2 movies.

The student insists to his media teacher at school that movie attendance is on the rise. Do you agree with this conclusion?
all is normal
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#4
4 years ago
Given that this student collected a convenience sample, we are very skeptical about any attempts to generalize it to a larger population.
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#5
4 years ago
The average American sees 3.9 movies at the theater each year. A curious student polls 30 friends and family over the course of a week. He finds that his friends have seen an average of 4.5 movies with a standard deviation of 1.2 movies.

Find and interpret a 95% confidence interval for this sample.
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#6
4 years ago
4.5 ± 2.045 = (4.05, 4.95); We are 95% confident that this student's friends see between 4.05 and 4.95 movies per year.
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#7
4 years ago
This site is awesome!
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#8
4 years ago
Slight Smile Good luck on the rest
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