HELP ME! Deandre estimated the weight of his mountain bike to be 13 kg. The actual weight of his mountain bike was 12.7 kg.
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Answer:
Step-by-step explanation:
Given that a survey asked, "How many tattoos do you currently have on your body?" Of the 1221 males surveyed, 193 responded that they had at least one tattoo. Of the 1005 females surveyed, 130 responded that they had at least one tattoo.
(two tailed test at 1% significance level)
Difference in proportions =
Standard error for difference in proportions = 0.0150
Margin of error = 2.58*std error
= 0.0387
99% confidence interval =
Since this confidence interval contains 0 for difference in proporiton we can say that H0 is true.
We are 99% confidence that for samples randomly drawn for large sizes, the males and females have approximately the same proportion.