to estimate a population mean
with the following sample.
103.8
79.8
97.1
93.9
93.2
65.2
86
82.6
62.9
79.5
You believe the population is normally distributed. Find the 90% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported accurate to one decimal place).
90% C.I. = (
,
)
Answer should be obtained without any preliminary rounding.
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