Mathematics, 18.10.2019 21:10 abbyg2710
Young children in the united states are exposed to an average of 4.0 hours of background
television per day. having the television on in the background while children are doing other activities
may have adverse consequences on a child’s well-being. you have a research hypothesis that children
from low-income families are exposed to more than 4.0 hours of daily background television. in order
to test this hypothesis, you have collected a random sample of 60 children from low-income families
and found that these children were exposed to a sample mean of 4.5 hours of daily background
television. based on a previous study, you are willing to assume that the population standard deviation
is 1.0 hours. use .01 as the level of significance.
a) develop hypotheses that can be used to test your research hypothesis.
b) what is the p-value based on your sample of 60 children from low-income families? what is your
hypothesis test decision based on p-value approach?
c) repeat the test using the critical value approach. what is your hypothesis test decision?
d) state your conclusion for the study.
Answers: 3
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Which expression is equivalent to 8(k + m) − 15(2k + 5m)?
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In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36
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Young children in the united states are exposed to an average of 4.0 hours of background
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