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Mathematics, 11.12.2019 18:31 curtisepps

In a random sample of 44 downloadable books from a website, the mean cost is $8.58 with a
standard deviation of $2.09.
which interval is the 95% confidence interval for the mean cost of all the downloadable books on
the website?
a.($8.39, $8.77)
b.($7.77, $9.35)
c.($8.26, $8.90)
d.($7.96, $9,20)

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