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The National Sporting Goods Association (NSGA) conducted a survey of the ages of individuals that purchased skateboarding footwear. The ages of this survey are summarized in the following relative frequency distribution. Suppose the survey was based on a sample of 200 individuals
Calculate the mean, variance and standard deviation of the age of individuals that purchased skateboarding shoes. Use 10 as the midpoint of the first class. Round answers to 2 decimal places.
hurricane katrina forced insurance companies to examine policy rates and originally determined that the average claim
a mean guy gave you a nice sample from normal distribution with known variance. so the test should be easy. but he
Sample standard deviation of 1.1%. Using alpha = 0.05, does the analyst have statistical evidence to reject the claim made by the magazine?
Which statistic technique can use.. when apply three treatment(treatment 1, treatment2, treatment3)on 2 dependent variable?(i applied 3 treatments consecutively and checked effect of them on 2 dependents variable. can i apply repeated measure of anov..
The null hypothesis is that there was no change in average liquor consumption. State this formally in terms of µ.
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
a regression of height x in inches on hourly earnings y in dollars yields the following
Let x be average number of employees in group health insurance plan and y be average administrative cost as percentage of claims. Determine sample correlation coefficient.
listed below are measured amounts of lead in the air. the epa has established an air quality standard for lead of 1.5
Consider a hypothesis test of H0: μ = 0 against H1: μ > 0 where μ is the mean percent change in total body bone mineral content of young women. The population standard deviation is σ = 2. The level of significance for the test is α = 0.05.
let xt be a brownian motion process with drift 10 and volatility 2.i find the conditional mean of x2 given x1 0 and
In a group of college students there are 200 women, 10 of whom smoke. There are 150 men, 32 of whom smoke. Calculate the probability a randomly selected student is a woman or a smoker.
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