Use the Following Information to Answer the Question

question 21

Multiple Choice

Use the following information to answer the question. According to the website ww.costofwedding.com, the average cost of
flowers for a wedding is $698. Recently, in a random sample of 40 weddings in the U.S. it was found that the average cost of
the flowers was $734, with a standard deviation of $102. On the basis of this, a 95% confidence interval for the mean cost of
flowers for a wedding is $701 to $767.
-For this description, which of the following does not describe a condition for a valid confidence interval?

• A) The sample size of 40 is large enough that knowledge about the population distribution is not necessary and the condition that the population be normally distributed or sample size be
• Larger than 25 is satisfied.
• B) The sample observations are independent because knowledge about the cost of flowers for any one wedding tells us nothing about the cost of flowers for any other wedding in the
• Sample.
• C) All of these describe conditions for a valid confidence interval.
• D) The description states that the sample was randomly selected, so we can assume that the condition which states that the data must represent a random sample is satisfied.

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Definitions:

Structural Coherence Plan

A planned approach ensuring that the various parts of a text or system are logically connected and unified.

Explanations

Statements or accounts that make something clear or understandable, often detailing causes, contexts, or reasons.

Introductions

The initial section of a document or speech that sets the stage for the content to follow, typically outlining the purpose or main topics.

Severe Time Constraints

Extremely limited or strict time periods within which tasks or objectives must be completed.