Dr.Sadik is studying the effects of a new anxiety drug on the ability of obsessive-compulsive patients to ignore their obsessive thoughts and not need to carry out their compulsive behaviours.To do this,she uses three doses of drug on different groups of patients: some take a high dose,others a low dose,and others take a placebo sugar pill.She then measures the number of compulsive behaviours performed by each patient.What statistic would Dr.Sadik use to determine if she has a significant difference between groups?
A) correlation coefficient
B) t-test
C) analysis of variance
D) standard deviation

Question

Quizplus · Accepted Answer

The appropriate statistical test to determine if there is a significant difference between multiple groups with different treatments is analysis of variance (ANOVA). This test compares the means of three or more groups to determine if there is a difference between them.

Option A) Correlation coefficient is used for measuring the degree of relationship between two continuous variables.

Option B) t-test is used for comparing the means of two groups and determining if there is a significant difference between them.

Option D) Standard deviation is a measure of the variability or spread of a distribution of data. It is not a statistical test for comparing groups.

DrSadik Is Studying the Effects of a New Anxiety Drug