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The “Wisconsin Card Sorting Test” is widely used by psychiatrists, neurologists, and neuropsychologists with patients who have a brain injury, neurodegenerative disease, or a mental illness such as schizophrenia. Patients with any sort of frontal lobe lesion generally do poorly on the test. The data frame WCST and the following table contain the test scores from a group of 50 patients from the Virgen del Camino Hospital (Pamplona, Spain).

The “Wisconsin Card Sorting Test” is widely used by psychiatrists, neurologists, and...

(a) Use the function EDA () from the PASWR package to explore the data and decide if normality can be assumed.

(b) What assumption(s) must be made to compute a 95% confidence interval for the population mean?

(c) Compute the confidence interval from (b).

 
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