Question: A sample of 19 data observations has a sample mean of x- = 11.80. If an experimenter wishes to use a known value a =

A sample of 19 data observations has a sample mean of x- = 11.80. If an experimenter wishes to use a "known" value a = 2.0 for the population standard deviation, find the value of c for which μ ∈ (c, ∞) is a one-sided 95% confidence interval for the population mean μ.

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