The Average Natural Gas Bill for a Random Sample of 21

question 131

Multiple Choice

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 ________.

• A) [$285.98, $337.82]
• B) [$292.48, $331.32]
• C) [$278.09. $345.71]
• D) [$266.82, $356.98]

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Definitions:

Firm Completion

A commitment to finish a project or deliver a product by a specified date.

Asymmetric Information

Assumes managers have more complete information than investors about a firm’s prospects—can have an important effect on capital structure.

Diversified Portfolios

Investment strategies involving the mixing of various asset classes and securities to reduce risk through diversification.

Financial Distress

A scenario in which a business is unable to fulfill or struggles to pay its debts to those it owes money to.