Question

Statistics professor has 115 students in a statistics class and would like to estimate the number of hours each student studying for the last exam. A random sample of 41 students was found to study an average of 7.3 hours with a standard deviation of 1.9 hours. The 95% confidence interval to estimate the average number of hours studying for the exam is

Answer #1

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A professor wants to estimate how many hours per week students
study. A simple random sample of 78 students had a mean of 15.0
hours of studying per week. Construct and interpret a 90%
confidence interval for the mean number of hours a student studies
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For a 4-unit class like Statistics, students should spend
average of 12 hours studying for the class. A survey was done on 23
students, and the distribution of total study hours per week is
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a) 68% of the students spend between hours and hours on Statistics
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average of 12 hours studying for the class. A survey was done on 23
students, and the distribution of total study hours per week is
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For a 4-unit class like Statistics, students should spend
average of 12 hours studying for the class. A survey was done on 20
students, and the distribution of total study hours per week is
bell-shaped with a mean of 13 hours and a standard deviation of 3.4
hours.
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A questionnaire about study habits was given to a random sample
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studying stats by students in this class.
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A professor at a university wants to estimate the average number
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A professor at a local community college is interested in
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. At a local university, the professor of sleep would like to
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A college professor wants to estimate the difference in mean
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