The Average Natural Gas Bill for a Random Sample of 21

question 34

Multiple Choice

The average natural gas bill for a random sample of 21 homes in the 19808 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)($266.82, $356.98)
• B)($292.46, $331.34)
• C)($278.09, $345.71)
• D)($285.98, $337.82)

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Definitions:

Seniority

The concept that privileges or status are granted based on the length of service or tenure in a position, often applied in political, academic, or professional contexts.

Congressional Assignments

The distribution of tasks, responsibilities, and roles to members of Congress, typically involving committee placements, leadership positions, and specific legislative duties.

Party Decline

The theory that political parties have become less influential and effective in political systems, particularly in guiding political action and mobilizing voters.

Grassroots Groups

are organizations that originate and operate at the local or community level, often mobilizing community members to effect change in public policy or social attitudes.