A Fast Food Restaurant Just Leased a New Freezer and Food

question 4

Essay

A fast food restaurant just leased a new freezer and food fryer for three years. The service contract for the freezer offers unlimited repairs for a fee of $125 a year plus a $35 service charge for each repair needed. The restaurant’s research suggested that during a given year 80% of these freezers need no repairs, 11% needed to be serviced once, 5% twice, 4% three times, and none required more than three repairs.
-Find the standard deviation of the number of repairs each year.

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Definitions:

Virtual Reality Exposure Therapy

A method used in psychotherapy that uses virtual reality technology to expose patients to stimuli related to their psychological conditions, providing a safe environment for therapy.

Dialectical Behavior Therapy

A type of cognitive-behavioral therapy developed to help people cope with stress, regulate emotions, and improve relationships with self and others, especially effective for those with borderline personality disorder.

Cognitive-behavioral Therapy

A form of psychotherapeutic treatment that aims to change patterns of thinking or behavior that are behind people's difficulties, thereby changing the way they feel.

Meta-analysis

A statistical technique that combines the results of multiple scientific studies to arrive at a comprehensive conclusion.