You Are Interested in Determining Whether the Mean Price of Electricity

question 90

Multiple Choice

You are interested in determining whether the mean price of electricity offered by solar companies is different in the southern states than in the northern states.You select a random sample of 8 solar companies from the southern states and 11 from the northern states.For the southern states,the average price is 12.2 cents per kWh (kilowatt hour) and the standard deviation is 0.8 cents per kWh.For the northern states,the average and standard deviation are 11.7 and 1.0 cents per kWh respectively.If you use a significance level α = 0.10 and assuming the values are normally distributed in both populations,the critical t value is ______.

• A) 1.330
• B) 1.729
• C) 1.734
• D) 1.740
• E) 1.747

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Definitions:

Dualistic

Relating to the concept or belief that reality consists of two fundamental components, often seen as the physical and the spiritual or the mind and the body.

Materialistic

Describes a value system that is preoccupied with possessions and the social status they convey, rather than intangible qualities or values.

Consciousness

The state of being aware of and able to think about oneself, one's surroundings, and one's thoughts and feelings.

Teratogens

Environmental substances that can harm prenatal development.