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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 newformula, 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?
what is the critical value for a left-tailed z-test at the 1 level of
Fitting of simple linear equation - Prepare an equation showing how daily sales are related to number of customers per day.
State whether the null hypothesis should be rejected on the basis - Write down the hypothesis
mimi just started her tennis class three weeks ago. on average she is able to return 15 of her opponents serves. let
you are visiting las vegas and would like to come home with more money than you arrived with. use your knowledge of
Find out the p-value associated with test of hypothesis you conducted?
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
Egyptians watch an average of 2.5 hours of television per person per day. If the standard deviation for the number of hours of television watched per day is 1.6 and a random sample of 225 Egyptians is selected, the mean of this sample belongs to a..
if we were randomly drawing a sample of one organizaiton from a population of 15 where five are high performers and
name the scale of measurement that applies to each of the following situationsa. james hall in 68.5 feet tall-b. a
The heights of 40 randomly selected people and the heights of their mothers are recorded. Statdisk is used to run a linear correlation and regression analysis. The partial results are provided below:
A sample of 64 observations is selected from a normal polulation with a population standard deviation of 15. The sample mean is 215. Ho: U>= 220 and H1: U
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