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1. A pharmaceutical manufacturer has come up with a new drug intended to provide greater headache relief than the old formula. Of 250 patients treated with the previous medication, 130 reported "fast relief from headache pain." Of 200 individuals treated with the new formula, 128 said they got "fast relief." At the 0.05 level, can we conclude that the new formula is better than the old? Using the appropriate statistical table, what is the approximate p-value for this test?
2. In tests of a speed-reading course, it is found that 10 subjects increased their reading speed by an average of 200 words per minute, with a standard deviation of 75 words. At the 0.10 level, does this sample information suggest that the course is really effective in improving reading speed? Using the appropriate statistical table, what is the approximate p-value for this test?
Identify and interpret the p-value for the test. Source: Andy Gardiner, "NCAA on Guard for ‘Rolled' Bats," USA Today, June 17, 2009, p. 8C.
Using classical methods discussed in class, try to estimate the probability of winning.
at a large midwestern college 4 of the students are hispanic. a random sample of 20 students from the college are
Consider the following situation describing layoffs at a manufacturing plant of the Monsanto Company. Does there appear to be a case of age discrimination between those laid off and those non-laid off?
What is the probability that a randomly selected high school senior's score on the mathematics part of the ACT will be more than 29?
a summary data on proportional stress limits for specimens constructed using two different types of wood are shown
in a survey of 2365 adults a proportion of 1320 said they worry about zombies.a. find p and q.b. with c0.99 construct
Approximately 34% of all university professors are extroverted Suppose you have classes with 5 Different professors. Find probability that 1 is extroverted? Find probability that 2 are extroverted.
What time usage guarantee (in hours) should the manufacturer advertise in order to ensure that only 4% of the cartridges fail to meet the guaranteed time usage?
a biased coin is flipped twice. there is a 59 probability that it will land heads on at least one of the two flips.
The budgeting process for a Midwestern college resulted in expense forecasts for the coming year (in $ millions) of $9, $10, $11, $12, and $13. Since the actual expenses are unknown, the following respective probabilities are assigned: .3, .2, .25..
find the region variable in the sampledataset. using sampledataset create a frequency distribution or a histogram.
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