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Mathematics, 04.07.2020 22:01 2kdragginppl
A sample of 20 items from a population with an unknown s is selected in order to develop an interval estimate of m. Which of the following is not necessary? a. We must assume the population has a normal distribution. b. We must use a t distribution. c. Sample standard deviation must be used to estimate s. d. The sample must have a normal distribution.
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