Consider the Following to Answer the Question(s) Below

question 6

Multiple Choice

Consider the following to answer the question(s) below:
A consumer group was interested in comparing the operating time of cordless toothbrushes manufactured by two different companies. They took a random sample of 18 toothbrushes from Company A and 15 from Company B. Each was charged overnight and the number of hours of use before needing to be recharged was recorded. Company A toothbrushes operated for an average of 119.7 hours with a standard deviation of 1.74 hours; Company B toothbrushes operated for an average of 120.6 hours with a standard deviation of 1.72 hours. Do these samples indicate that Company B toothbrushes operate more hours on average than Company A toothbrushes?
-Which of the following statements is true?

• A) This is a one-tailed test for the difference in the means of two dependent groups.
• B) This is a two-tailed test for the difference in the means of two independent groups.
• C) This is a one-tailed test for the difference in the means of two independent groups.
• D) These samples are matched.
• E) This is a two-tailed test for the difference in the means of two dependent groups.

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Definitions:

Auction

A public sale in which goods or properties are sold to the highest bidder through a competitive bidding process.

Withdrawn

Refers to the act of removing something from consideration, cancellation of a claim, statement, or participation.

Auctioneer

A person authorized to conduct auctions, overseeing the bidding process and finalizing the sale of items.

Offeree

The person or party to whom an offer is made, especially in the context of contracts.