According to the Pew Research Center, the proportion of the American population who use only a cellular telephone (no land line) is 0.37. Jason conducts a survey of thirty 20- to 24-year-olds who live on their own and ﬁnds that 16 do not have a land line to their home. Does this provide sufﬁcient evidence to conclude that the proportion of 20- to 24-year-olds who live on their own and don’t have a land line is greater than 0.37? Use an α = 0.10 level of signiﬁcance.
Answer to relevant QuestionsAccording to the U.S. Census Bureau, 10.5% of registered births in the United States in 2007 were to teenage mothers. A sociologist believes that this percentage has increased since then. (a) Determine the null and ...According to the Centers for Disease Control and Prevention, 19.6% of children aged 6 to 11 years are overweight. A school nurse thinks that the percentage of 6- to 11-year-olds who are overweight is higher in her school ...The following is an excerpt from a Consumer Reports article. The platinum Gasaver makes some impressive claims. The device, $188 for two, is guaranteed to increase gas mileage by 22% says the manufacturer, National ...H0: p = 0.3 versus H1: p > 0.3 n = 200; x = 75; α = 0.05 Test the hypothesis using (a) The classical approach and (b) The P-value approach. Be sure to verify the requirements of the test. Nexium is a drug that can be used to reduce the acid produced by the body and heal damage to the esophagus due to acid reﬂux. The manufacturer of Nexium claims that more than 94% of patients taking Nexium are healed within ...
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