Solve the problem.For the study described below, identify the sample statistic.A manufacturer of light bulbs wants to determine the average lifetime of its 75-watt light bulbs. Among 120 randomly selected 75-watt light bulbs, the average lifetime was 1007 hours.
A. The 120 randomly selected 75-watt light bulbs
B. 120, the number of light bulbs in the sample
C. The average lifetime of all 75-watt light bulbs manufactured by the company
D. The average lifetime of the 120 randomly selected 75-watt light bulbs
Answer: D
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Solve the problem. Round to the nearest tenth if necessary.A medical clinic has 0.8 L of a medication on hand. How many milliliters are on hand?
A. 8 ml B. 800 ml C. 8000 ml D. 80 ml
Solve the problem. Round your answer to two decimal places.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 105 seconds are required to make a 3-by-5 enlargement, find the time required for a 5-by-10 enlargement.
A. 450 sec B. 400 sec C. 300 sec D. 350 sec
Determine the place value of the digit 3 in the whole number.1392
A. tens B. hundreds C. ones D. thousands