Question 13 (7 points) The director of admissions at the University of Maryland,
ID: 3176314 • Letter: Q
Question
Question 13 (7 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 = $75. (Note the sample standard deviation is different from the first part).
Using the .05 level of significance, is there evidence that the population mean is above $300?
Question 13 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
Statistical software output for 95% confidence interval will be:
One sample T confidence interval:
: Mean of population
95% confidence interval results:
Hence,
There is no evidence that population mean is above $300 because 300 is in the confidence interval.
Option C is correct.
Mean Sample Mean Std. Err. DF L. Limit U. Limit 315.4 15 24 284.44152 346.35848Related Questions
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