Consider the Following to Answer the Question(s) Below

question 30

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?
-At α = 0.05,

• A) we reject the null hypothesis.
• B) we fail to reject the alternative hypothesis.
• C) we can conclude that there is significant difference between the mean operating times of cordless toothbrushes manufactured by the two companies.
• D) we fail to reject the null hypothesis. There is not enough evidence to indicate that Company B cordless toothbrushes operate longer, on average, than those of Company A.
• E) we fail to reject the alternative hypothesis. There is strong evidence indicating that Company B cordless toothbrushes operate longer on average than those of Company A.

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A written or printed work consisting of pages glued or sewn together along one side and bound in covers.

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Money owed by one party, the debtor, to another, the creditor, typically arising from a loan or credit agreement.

Incidental Beneficiary

A person or entity who unintentionally gains a benefit from a contract between two other parties, though the contract was not specifically intended for their benefit.

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