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1. N = 8 different items are within a population. If we wish to select a sample of size n = 3, how many ways are there of sampling? What is the probability that any one sample will be chosen? What is the probability that any one item will be in the sample?
2. Suppose that a population variable X has the values 1, 2, 3, 4, 5, and 6. Determine the sampling distribution of the mean for samples of size n = 2.
What is its mean and standard deviation? Repeat this exercise for n = 3 and compare your results.
Distribution in Research simulation located on your student website. During the third cycle of the simulation, you need to make a decision about buying machinery.
Using a spreadsheet, create a table that shows the relationship among the units of heights of people in centimeters, inches and feet in the range of 150cm to 2m. Use increments of 5cm.
What is the amount by which we will be off on average when predicting values for the dependent variable using the regression model?
Are Violent Crimes Distributed Uniformly? Based on data from the Federal Bureau of Investigation, violent crimes in a recent year occurred with the distribution given in the accompanying table.
Let X1 and X2 denote the proportion of two different chemicals found in a sample mixture of chemicals and used as an insecticide. Suppose X1 and X2 have the joint probability density function given by:
Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury system appear to be fair?
The heart rate in beats per minutes of 30 randomly selected students are given below: 78 64 69 75 80 63 70 72 72 68 77 71 74 84 70 62 67 71 69 58 74 70 80 80 63 88 60 68 69 70 71. Is it normal distribution or find the normal distribution.
the comfort widget company makes severtal different widgets. the smallest widget the company manufactures has a mean
Given that the pair of hypotheses that correspond to the claim are H0=500. Find the critical value for the hypothesis test.Assume that the level of significance is 0.02.
SAT verbal scores are normally distributed with a mean of 494 and a standard deviation of 97. Use the Empirical Rule to determine what percent of the scores lie between 300 and 591.
To forecast attendance at an yearly tennis tournament a model has been developed that uses attendance from the previous year and the amount spent for advertising this year.
find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made
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