Menstrual cycle length. Menstrual cycle lengths (days) in an SRS of nine women are as follows: {31,

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Menstrual cycle length. Menstrual cycle lengths (days) in an SRS of nine women are as follows: {31, 28, 26, 24, 29, 33, 25, 26, 28}. Use this data to test whether mean menstrual cycle length differs significantly from a lunar month. (A lunar month is  29.5 days.)

Assume that population values vary according to a Normal distribution. Use a two-sided alternative. Show all hypothesis-testing steps.

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