hashish. According to a publication, 12.6%12.6% of 18-2518-25-year-olds were current users of marijuana or hashish in 19971997. Do the data provide sufficient evidence to conclude that the percentage of 18-2518-25-year-olds who currently use marijuana or hashish has changed from the 19971997 percentage of 12.6%12.6%? Use ?=0.01α=0.01 as the level for declaring significance. the sample's test statistic ? is the positive critical ? score for
A recent poll of 23002300 randomly selected 18-2518-25-year-olds revealed that 266266 currently use marijuana or hashish. According to a publication, 12.6%12.6% of 18-2518-25-year-olds were current users of marijuana or hashish in 19971997. Do the data provide sufficient evidence to conclude that the percentage of 18-2518-25-year-olds who currently use marijuana or hashish has changed from the 19971997 percentage of 12.6%12.6%? Use ?=0.01α=0.01 as the level for declaring significance.
the sample's test statistic ? is
the positive critical ? score for declaring significance is
the negative critical ? score for declaring significance is
The conclusion is
A. There is sufficient evidence to conclude that the percentage of 18-25 year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.6%.
B. There is not sufficient evidence to conclude that the percentage of 18-25year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.6%
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