G16.23

Perinatal growth failure. Among the 33 perinatal growth failure cases discussed in the prior exercise, eight (24.2%) had very-low intelligence test scores when tested at 8 years of age. In normal birthweight babies, we'd expect 2.5% of the population to exhibit this trait. Perform a one-sided exact binomial test to address whether the observation is statistically significant. Show all steps.

Hypotheses in words and symbols:

This is a one sample problem: Is the population proportion = constant?

Assumptions: (include why we can't use the normal approximation)

Results:phat = ????? pvalue =?????

Interpretation

Conclusion: