Gifted Children, Part I: Researchers investigating characteristics of gifted children collected data schools in a large city on a random sample of thirty-six children who were identified as gifted children soon after they reached the age of four. The following histogram shows the distribution of the ages (in months) at which these children first counted to 10 successfully. Also provided are some sample statistics.

Gifted Children, Part I: Researchers investigating

a) Are conditions for inference satisfied?
b) Suppose you read on a parenting website that children first counts to 10 successfully when they are 32 months old, on average. Perform a hypothesis test to evaluate if these data provide convincing evidence that the average age at which gifted children first count to 10 successfully is different than the general average of 32 months. Use a significance level of 0.10.
c) Interpret the p-value in context of the hypothesis test and the data.
d) Calculate a 90% confidence interval for the average age at which gifted children first count to 10 successfully.
e) Do your results from the hypothesis test and the confidence interval agree? Explain.