A researcher is interested in the average gestational age at
birth of infants subjected to fetal surgery for congenital
anomalies. Assume that the gestational age is approximately
normally distributed. The researcher wants to test the claim that
the gestational age is less than 32 weeks. She takes a simple
random sample of 14 infants and gets a sample mean
of =
29.6 weeks and =
3.6 weeks. She sets her significance level to be =.05.
A) What is the value of the test statistic? Use 2 decimal
places.
B) What is the critical value?
A researcher is interested in the average gestational age at birth of infants subjected to fetal surgery for congenital
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A researcher is interested in the average gestational age at birth of infants subjected to fetal surgery for congenital
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