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Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enrolled in. The students
Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enrolled in. The students collect a random sample of 49 students. The mean of the sample is 12.2 units. The sample has a standard deviation is 1.6 units.
What is the 95% confidence interval for the number of units students in their college are enrolled in? Assume that the distribution of individual student enrollment units at this college is approximately normal.
- (10.2 , 14.2)
- (12.0 , 12.4)
- (9.0 , 15.4)
- (11.7 , 12.7)
- No confidence interval can be constructed since the conditions for a T-interval are not met.
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