Medical imaging studies have found a possible link between autism and the absenc
ID: 3133905 • Letter: M
Question
Medical imaging studies have found a possible link between autism and the absence of two structures in the brain (the "superior olives") that are used for interpreting facial expressions and other social cues. Doctors want to know whether the link is real. They randomly select patients at risk for autism. Those that have superior olives are placed in one group and those that do not, in another. All the patients are screened for autism. The percentages of autistic patients in the two groups are to be compared. A hypothesis test for which of the following is most suitable for this comparison?
One mean, known
One mean, unknown
Paired data
Two means, using independent samples
ANOVA
One proportion
Two proportions
Independence of categorical variables
Medical imaging studies have found a possible link between autism and the absence of two structures in the brain (the "superior olives") that are used for interpreting facial expressions and other social cues. Doctors want to know whether the link is real. They randomly select patients at risk for autism. Those that have superior olives are placed in one group and those that do not, in another. All the patients are screened for autism. The percentages of autistic patients in the two groups are to be compared. A hypothesis test for which of the following is most suitable for this comparison?
One mean, known
One mean, unknown
Paired data
Two means, using independent samples
ANOVA
One proportion
Two proportions
Independence of categorical variables
Explanation / Answer
The sample of patients at risk of autism are selected randomly, and since patients are selected at random it is natural to perceive that patients with superior olives are independnet of patients with not superior olives. Then percenatge of autistic patients (number of autistic patients with superior olives showed autism versus number of autistic patients showing autism withour superior olives) are compared. This follows the success/failure condition of two proportion test.
Suitable test:Two proportion