Mathematics, 01.10.2019 20:00 jpatte2oye8qv
You are interested in determining which of two brands of light bulbs, brand a and brand b, lasts longer under differing conditions of use. fifty bovano lamps are fitted with brand a light bulbs and 50 bulbrite lamps are fitted with brand b light bulbs. each light bulb is left on for 20,000 hours straight. light bulb life is then measured for each bulb, and the average light bulb life for the two brands is compared. what is wrong with this experimental design?
(a) nothing is wrong with this design.
(b) the type of lamp is a confounding variable.
(c) not enough light bulbs of each type are used in the study.
(d) the experiment should have been conducted on more than two brands of lamps.
(e) average light bulb life is not a proper measure for comparison.
Answers: 3
Mathematics, 21.06.2019 20:00
Given: ∆mop p∆mop =12+4 3 m∠p = 90°, m∠m = 60° find: mp, mo
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Mathematics, 21.06.2019 20:00
What is the radical expression that is equivalent to the expression 27 1 over 5?
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Mathematics, 21.06.2019 21:20
Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)
Answers: 3
You are interested in determining which of two brands of light bulbs, brand a and brand b, lasts lon...
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