Mathematics, 06.11.2020 17:10 jj1077348
Does secondhand smoke increase the risk of a low weight birth? A baby is “low birth weight” if it weighs less than 5.5 pounds at birth. According to the National Center of Health Statistics, about 7.8% of all babies born in the U. S. are categorized as low birth weight. Researchers randomly select 1200 babies whose mothers had extensive exposure to secondhand smoke during pregnancy. 10.4% of the sample are categorized as low birth weight.
Which of the following are the appropriate null and alternative hypotheses for this research question.
H
0
: p = 0.078;
H
a
: p ≠ 0.078
H
0
: p = 0.078;
H
a
: p > 0.078
H
0
: p = 0.104;
H
a
: p ≠ 0.104
H
0
: μ = 0.104;
H
a
: μ > 0.104
Answers: 3
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Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.
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Mathematics, 21.06.2019 21:10
Hey free points ! people i have a few math questions on my profile consider looking at them i have to get done in 30 mins!
Answers: 1
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