The following table shows part of the probability distribution for the number of boats sold daily at Boats Unlimited.It is known that the average number of boats sold daily is 1.57. 
Compute the variance and the standard deviation for this probability distribution.
Definitions:
Self-Defense Training
Instruction in techniques and strategies to protect oneself from physical harm in potentially dangerous situations.
Threatening Manner
Behavior or gestures that imply danger or the intention to cause harm.
Anti-Gay Prejudice
Hostility or negative attitudes towards individuals based on their perceived or actual homosexual orientation.
Biased Culture
A societal or group tendency to favor certain perspectives, values, or beliefs, often leading to unfair treatment or discrimination against others.
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