A Market Research Company Was Interested in Assessing How Much

question 20

Multiple Choice

A market research company was interested in assessing how much money a single adult typically spent on groceries in one week.Participants were 772 single adults and the mean weekly grocery expenditure was found to be $69.70 with a standard deviation of $2.80.The 99% confidence interval for the mean weekly grocery expenditures for single adults would be _____.

• A)[63.19,76.21]
• B)[62.49,76.91]
• C)[69.65,69.75]
• D)[69.47,69.93]
• E)[69.44,69.96]

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Definitions:

Free Radicals

Highly reactive molecules with unpaired electrons that can cause cellular damage, leading to various diseases and aging.

Genetic-Programming Theory

A theory that suggests aging and eventual death are caused by certain genes activating over time, which control various processes that lead to the aging phenomena.

Variable-Rate Theory

A theoretical concept that suggests the rate or speed of a process varies in response to different factors or conditions.

Psychosocial Theory

A theory formulated by Erik Erikson that proposes that individual psychological development occurs in eight predetermined stages, each stage marked by specific challenges and potential outcomes.