Nationwide, the Average Waiting Time Until a Electric Utility Customer

question 75

Multiple Choice

Nationwide, the average waiting time until a electric utility customer service representative answers a call is 210 seconds. The Gigantic Kilowatt Energy Company randomly sampled 30 calls and found that, on average, they were answered in 183 seconds with a population standard deviation of 30 seconds. Can the company claim that they are faster than the average utility at α = 0.05?

• A) Yes, because the test value -4.93 falls in the critical region.
• B) No, because the test value -0.90 falls in the critical region.
• C) Yes, because the test value -0.16 falls in the critical region.
• D) No, because the test value -0.16 falls in the critical region.

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Definitions:

Vascular Bundles

Strands of specialized tissue in plants that contain xylem and phloem for the transportation of water, nutrients, and sugars.

Apical Meristem

A region of plant tissue, found at the tips of roots and shoots, responsible for primary growth.

Woody Bark

The tough, protective outer layer of a woody plant or tree, consisting of dead cells and providing support and protection.

Monocots

Plants that have a single embryonic leaf, or cotyledon, in their seeds, distinguishing them from dicots.