The Prices (In Dollars) for a Graphing Calculator Are Shown $5.4 < \sigma < 13.7$

question 42

Multiple Choice

The prices (in dollars) for a graphing calculator are shown below for 8 online vendors. Estimate the population standard deviation in price with 90% confidence.
148 133 136 152
140 143 129 139

• A) \(5.4 < \sigma < 13.7\)
• B) \(7.3 < \sigma < 7.9\)
• C) \(6.4 < \sigma < 12.3\)
• D) \(7.1 < \sigma < 10.3\)

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Definitions:

Interpersonal Therapy

A short-term, structured psychotherapy that focuses on improving interpersonal relationships and communication patterns to alleviate symptoms of mental illness.

Established Therapies

Therapeutic modalities that have been widely accepted and used due to their proven effectiveness and reliability.

Treating Depression

Involves a range of interventions, including pharmacological, psychotherapeutic, and lifestyle changes aimed at alleviating the symptoms of depression.

Cognitive-behavioral Therapy

A therapeutic approach that addresses maladaptive behaviors and thoughts through systematic procedures, aiming to change patterns of thinking or behavior that underlie people's difficulties.