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The Average Natural Gas Bill for a Random Sample of 21

question 81

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The average natural gas bill for a random sample of 21 homes in 19810 zip code during the month of March was $311.90 with a sample standard deviation of $51.60.The 90% confidence interval around this sample mean is _______.


Definitions:

Uncontrollable Events

Situations or occurrences that individuals cannot influence or alter through their actions or decisions.

Julian Rotter

An American psychologist known for his work in social learning theory and the development of the concept of locus of control.

Sonja Lyubomirsky

A professor of psychology known for her research on human happiness.

Learned Helplessness

A condition in which a person suffers from a sense of powerlessness, arising from a traumatic event or persistent failure to succeed, leading to decreased motivation and depression.

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