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Data from the MTF 2006 survey reveal that 71.5% (432 out of 604) of males and 74% (562 out of 756) of females reported trying alcohol. Your wonder whether there is any difference between males and females in the population trying alcohol (this variable does not measure regular use, only if the student had ever tried alcohol). Use a test of the difference between proportions when answering these questions.
Test your hypothesis at the 0.05 level. What do you conclude?
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
Test the equality of the means of three populations.
A 95% confidence interval for µ is found to be 652 ± 21.56 = ($630.44, $673.56). Determine which of the following statements is true.
what is the sample space of all possible outcomes? Are the outcomes equally likely?
Would you use a one-tailed or two-tailed test? Explain your response.
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
To find out the prior probability, conditional probability and posterior probability. Calculate the posterior probability that the bid will be successful given a request for additional information.
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
In how many different ways can 5 songs be arranged if a particular song must be the first on the EP?
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
With this important detail, are there any significant differences with LSD?
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
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