It has been suggested that abnormal male children tend to be born to older-than-average parents. Case histories
Question:
The mean age at which mothers in the general population give birth is 28.0 years.
a. Calculate the sample mean and standard deviation.
b. Does the sample give sufficient evidence to support the claim that abnormal male children have older than- average mothers? Use a = 0.05 Assume ages have a normal distribution.
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a Summary of data n 20 x 629 x 21013 xn 62920 3145 s x xnn 1 21013 6292019 647868 s 80...View the full answer
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