Births really are not evenly distributed across the days of

Births really are not evenly distributed across the days of the week. The data in Example 23.8 failed to reject this null hypothesis because of random variation in a quite small number of births. Here are data on 700 births in the same locale:

The null hypothesis is that all days are equally probable. The probabilities specified by this null hypothesis are,

The expected counts specified by the null hypothesis for each day in 800 births are,

The value of the chi-square statistic for goodness of fit is,

The degrees of freedom for this statistic are,

Which of the following statements best applies?

p ₁ = p₂ = p₃ = p₄ = p₅ = p₆ = p₇ = 1/7

None of the probabilities is zero.

p ₁ + p₂ + p₃ + p₄ + p₅ + p₆ + p₇ = 1/7

p ₁ = p₂ = p₃ = p₄ = p₅ = p₆ = p₇ = 1/6

Births really are not evenly distributed across the days of the week. The data in Example 23.8 failed to reject this null hypothesis because of random variation

Births really are not evenly distributed across the days of

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