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The director of admission at the University of Maryland, University college is concerned about the high...

The director of admission 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 a significance level of .1, what are the boundaries of the confidence interval?

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Answer #1

n = 25

= 315.40

s = 43.20

=0.10

nf = 25 - 1 = 24

From Table, critical values of t = 1.711

Confidence Interval:

So,

Answer is:

(300.618, 330.182)

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