1. A study to compare two types of infant formula was run at two sites, one in Atlanta and the second in Denver. The study was run over a three-week period. Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study. The following table gives the number of dropouts and completers at each site. A chi-square test was performed and the result was X2 = 5.101 with P-value = 0.024.
The correct conclusion is
A. Atlanta had a greater dropout rate.
B. Denver had a greater dropout rate.
C. any differences can be explained by sampling variability.
2. A study was performed to examine the personal goals of children in grades 4, 5, and 6. A random sample of students was selected for each of the grades from schools in Georgia. The students received a questionnaire regarding personal goals. They were asked what they would most like to do at school: make good grades, be popular, or be good at sports. Results are presented in the table below by the sex of the child.
This is a
A. 2 × 2 table.
B. 2 × 3 table.
C. 3 × 2 table.