Mathematics, 22.04.2020 03:58 cocoapop
You wonder if TV ads are more effective when they are longer or repeated more often or both. So you design an experiment. You prepare 30-second and 60-second ads for a camera. Your subjects all watch the same TV program, but you assign them at random to four groups. One group sees the 30-second ad once during the program; another sees it three times; the third group sees the 60-second ad once; and the last group sees the 60-second ad three times. You ask all subjects how likely they are to buy the camera. (a) This is a randomized block design, but not a matched pairs design. (b) This is a matched pairs design. (c) This is a completely randomized design with one explanatory variable (factor). (d) This is a completely randomized design with two explanatory variables (factors). (e) This is a completely randomized design with four explanatory variables (factors).
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Mathematics, 21.06.2019 17:30
James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum
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Mathematics, 21.06.2019 19:20
Which of the following is the result of expanding the series
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Mathematics, 21.06.2019 19:30
Me. i can't figure out this question. give an explanation too. .
Answers: 1
You wonder if TV ads are more effective when they are longer or repeated more often or both. So you...
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