In NYC City, a study was conducted to identify children with special educational needs.
In a random sample of 45 third graders enrolled in the specialized education program of the public school system, 4 of their mothers had severe morning sickness (hyperemesis gravidarum, HG) during the first trimester of pregnancy.
Construct a 90% confidence interval for the proportion of children with special educational needs whose mothers had HG. Do you have any concerns about your calculation?
In 20xx, 22% of all third-graders enrolled in the NYC City public school system had mothers who had had HG. Suppose you wish to know whether this proportion is the same for children in the specialized education program. What are the null hypothesis and alternative hypothesis of the appropriate test?
Conduct the test at the 0.05 level of significance.
What do you conclude?
In NYC City, a study was conducted to identify children with
special educational needs.
In a random sample of 45 third graders enrolled in the
specialized education program of the public school syste