It was noted in Question 4.3.24 that the mean () and standard deviation () of pregnancy durations

It was noted in Question 4.3.24 that the mean (μ) and standard deviation (σ) of pregnancy durations are 266 days and 16 days, respectively. Accepting those as the true parameter values, test whether the additional assumption that pregnancy durations are normally distributed is supported by the following list of seventy pregnancy durations reported by County General Hospital. Let α = 0.10 be the level of significance. Use €œ220 ‰¤ y

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