E-cigarettes are battery operated devices that aim to mimic standard cigarettes.
ID: 3156231 • Letter: E
Question
E-cigarettes are battery operated devices that aim to mimic standard cigarettes. They don't contain tobacco but operate by heating nicotine into a vapor that is inhaled. Here is an excerpt from a 2014 UK public health report in which the use of e-cigarettes among children (ages 11 to 18) is summarized: In terms of prevalence, among all children "ever use" of e-cigarettes was low but did increase between the two surveys. In 2011 it was 3.3%, rising to 6.8% (p 1 day in the past 30 days) significantly increased from 1.1 to 2.1% (pExplanation / Answer
The null hypothesis H0 is the hypothesis the researcher wants to reject. It is the hypothesis that is actually tested and is the basis for the selection of test statistics.
Here, we want to reject the hypothesis that the use of E Cigarattes is low and is not increasing. Thus, it will be the null hypothesis and Alternative hypothesis will be that the use of E Cigarettes is increasing.
b.) Being significant at 1% significance level means that 99% of the values should reject the null hypothesis. 1% is a more stringent level of checking whether the results reject the null hypothesis when it is true or not. We cannot surely say that from the data given to us as only the change in the percentage usage is provided.
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