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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?
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
The following show the hours of sleep on weeknights for a sample of individuals age 49 and younger and for a sample of individuals age 50 and older.
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
For each of the following two scenarios/descriptions (pp.2), please select two responses, one to indicate the most appropriate test of inference
We are asked to test for independence between age (i.e., adult and teen) and drink preferences.
Using the appropriate statistical procedure on the SPSS, test the between group means for a significant difference.
Determine the probability that none of the calculators will be defective?
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
You draw two cards from a standard deck of 52 cards, but before you draw the second card, you put the first one back and reshuffle the deck.
Significance level to test the claim that less than half (.5) of all executives identify that error as being the most common job interviewing error.
What fraction of the calls last between 4.2 and 5 minutes?
It is impossible to obtain a standard error less than 2 for any sized sample.
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