Question 12 (6 points) The director of admissions at the University of Maryland,
ID: 3176313 • Letter: Q
Question
Question 12 (6 points)
The director of admissions at the University of Maryland, University College is concerned about the high cost of textbooks for the students each semester. A sample of 25 students enrolled in the university indicates that x(bar) = $315.40 and s = $43.20.
Using the .10 level of significance, is there evidence that the population mean is above $300?
Question 12 options:
No, because 300 is below the lower limit of the confidence interval
Yes, because 300 is below the lower limit of the confidence interval
No, because 300 is in the confidence interval
Yes, because 300 is in the confidence interval
No, because 300 is below the lower limit of the confidence interval
Yes, because 300 is below the lower limit of the confidence interval
No, because 300 is in the confidence interval
Yes, because 300 is in the confidence interval
Explanation / Answer
The statistical software output for this problem is:
One sample T confidence interval:
: Mean of population
90% confidence interval results:
Hence,
There is evidence that the population mean is above $300 because 300 is below the lower limit of the confidence interval.
Option B is correct.
Mean Sample Mean Std. Err. DF L. Limit U. Limit 315.4 8.64 24 300.61798 330.18202Related Questions
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