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70% of smokers started smoking before the age of 18. Suppose 10 smokers are randomly selected and the number of smokers who started to smoke before the age of 18 is recorded.
a) explain why this is binomial experiment.
b) find the probability that exactly 7 of them started smoking before the age of 18.
c) find the probability that at least 7 of them started smoking before the age of 18.
d) find the probability that fewer than 4 of them started smoking before the age of 18.
e) find the probability that between 8 and 10 (inclusive) of them started smoking before the age of 18.
If the names of these 100 people in the building are still unknown but a room is allowed to lodge one tenant at most , then are there how many ways of room occupation?
The company believes that it averages about the same weight per bag in each of two production lines. To test this idea, they will perform a hypothesis test to compare the two lines at the alpha level of 0.05. State the null and alternative hypothe..
Standard deviation of 14 inches. What is the probability that the mean annual snowfall will be between 70 and 80 inches.
Assuming this is literally true, how can it be explained? What facts / statistics would you need to know to expose this misleading claim?
Satisfies each of the following statements. In each case, sketch a standard Normal curve and shade the area under the curve that is the answer to the question.
A new business with 125 employees is moving into the area. what is the probability that the new employees will consume more than 240 cups of coffee per day.
Can you provide another explanation for this one: Zc/Tc for 86% confidence interval when the sample size 50?
What is a Wilcoxon-Whitney Test and when is it used? I am not sure when to use the Wilcoxon-Whitney Test and what it is testing.
In study of a clinical for an allergy drug 115 of the 204 subjects reported experiencing important relief from their symptoms.
The liquid chlorine added to swimming pools to combat algae has a relatively short shelf life before it loses its effectiveness. Records indicate that the mean shelf life of a 5-gallon jug of chlorine is 2,10 hours (90 days).
Assume that the population is 0.55. Compute the standard error of the sample proportion for the following sample sizes:
Formulate and LP model for this problem using Excel. Sketch the feasible region for this problem using Excel. Find the optimal solution
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