A researcher asked 26 extroverts and 36 introverts how happy they were.The results are shown in the graph below.The 
= 2.96.Calculate the strength of the relationship using the squared Point-Biserial Correlation Coefficient.
Definitions:
Frontal Cortex
The part of the brain located at the front of each cerebral hemisphere, involved in decision making, problem solving, and controlling behavior.
Schizophrenia
A psychiatric disorder marked by severe distortions in thinking, perception, emotions, language, sense of self, and behavior.
Kwashiorkor Syndrome
A severe form of malnutrition caused by inadequate protein intake, characterized by swelling, an enlarged liver, and other health issues.
Chronic Malnutrition
A long-term nutritional deficiency characterized by not getting enough food or not getting the right sort of food, leading to stunted growth, delayed development, and other health issues.
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Q71: In statistics a sample is<br>A)the entire group