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The breaking strength of threads has a standard deviation of 18 grams. How many measures on breaking strength should be used in the next experiment if the estimate of the mean breaking strength is to be within 4 grams of the true mean breaking strength, with confidence coefficient 0.9?
2. The staff at a local psychiatric facility wants to determine whether implementing a No Smoking rule significantly decreases the length of stay of inpatients.
What is the probability of winning if the rules are changed so that in addition to selecting the correct five numbers, you must now select them in the same order they are drawn?
She selected a random sample of 50 students from each of the four dormitories. What is the null hypothesis for this situation?
in a study of the effectiveness of garlic for lowering cholesterol 17 subjects were treated with garlicin which is
College graduates, and half of the college graduates are married. What is the probability that a randomly chosen worker is: Neither married nor a college graduate?
A sample of 45 overweight men participated in an exercise program. At the conclusion of the program 32 had lost weight. At the .05 significance level, can we conclude the program is effective?
Approximately what percentage of the manufacturer's batteries will last between 40 months and 80 months? suppose your battery lasts 37 months. What could you infer about the manufacturer's claim?
sketch a venn diagram of these eventsberkeley and chelsea visited independently of one another.berkeley visited with
at a track and field tournament freds long jumps vary evenly from 6.5 to 7.2 meters. let x be the length of freds long
What is the five step process for hypothesis testing? Why or why not? What is the null hypothesis? Why is it important? What are its implications? Explain. You may use examples to show your understanding.
for a population with a mean of micro 50 and a standard deviation of s 10 how much error on average would you expect
You work at a hospital that has always had about 100 emloyees staffed at night. You think that the number of employees staffed at night has recently decreased and would like to test this claim.
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