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Suppose that there are 63 boys assigned to the new drug group and 58 boys assigned to the placebo. Is there a statistically significant difference in the proportions of boys assigned to the treatments? Run the appropriate test at a 5% level of significance.
Draw a Venn diagram that shows the relation between the events A and Bin Exercise 4.106. Indicate each of the following events on your diagram and use the information in Exercise 4.106 to calculate the probability of each event. Finally, describe..
What is the actual formula for finding the exact probability from the z-score without having to use the table?
at one college gpas are normally distributed with a mean of 2.8 and a standard deviation of 0.4. what percentage of
If he finds differences, then he may realize that, 1) he will need to evaluate his course ethnic sensitivity,
a particular pitching machine is manufactured so that it will throw the ball into the strike zone of a 6-foot batter 90
What is the probability that he will answer all questions correctly?
Find the alternative would be chosen according to expected value and utility.
the grains composing polycrystalline metals tend to have weights that follow a log-normal distribution. for a type of
when a machine is improperly adjusted it has probability 0.2 of producing a defective item. each day the machine is run
A sample of n=20 has a mean of M=40. If the standard deviation is s=5, would a score of x=55 be considered an extreme value?
Suppose that students in a particular school are all very competent. For each individual, the probability that they will pass the proficiency exam (independent of thier classmates) is 0.99
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
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