A psychologist's is studying the affects of Ritalin on concentration in 40 children that have been matched on age and IQ.Twenty of the children receive Ritalin and are asked to take an exam that measures their concentration.The other 20 children did not receive Ritalin,but a placebo pill and took the same exam.After graphing this data,the researcher realizes that the data is not normally distributed.What should he do?
A)Increase your sample size
B)use a nonparametric test to analyze data
C)Give up and start over
D)Both a & b
E)None of these

Question

Quizplus · Accepted Answer

The data is not normally distributed, so a nonparametric test should be used to analyze the data. Increasing the sample size will not make the data normally distributed. Giving up and starting over is not necessary.

A Psychologist's Is Studying the Affects of Ritalin on Concentration