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young children in the united States are exposed to an average of 4
hours of background television per day (cnn website, november 13, 2012). Having the television on in the background while children are doing other activities may have adverse consequences on a child’s 85317_ch09_ptg01.indd 430 06/01/16 2:35 PM Copyright 2017 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights restrictions require it. `Ìi`ÊÜÌÊÌiÊ`iÊÛiÀÃÊvÊ vÝÊ*ÀÊ*Ê `ÌÀ /ÊÀiÛiÊÌÃÊÌVi]ÊÛÃÌÊ ÜÜÜ°Vi°VÉÕV°Ì Supplementary Exercises 431 well-being. you have a research hypothesis that children from low-income families are exposed to more than 4 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. a. develop hypotheses that can be used to test your research hypothesis. b. based on a previous study, you are willing to assume that the population standard deviation is s 5 0.5 hours. what is the p-value based on your sample of 60 children from low-income families? c. use a 5 .01 as the level of significance. what is your conclusion?
 
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