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Part A: What is dispersion? Briefly name five measures of dispersion. Describe the characteristics of the standard deviation. Explain!
Part B: Briefly describe to what kind of data does Chebyshev's Theorem apply? To what kind of data does Empirical Rule apply? Explain.
At.05 level of significance, is there evidence to propose that mean life length of batteries produced by this manufacturer is more than 400 hours?
Kurt's Adventures, Inc. stock is quite cyclical. In a boom economy, the stock is expected to return 30% in comparison to 12% in a normal economy and a negative 20% in a recessionary period.
At the .05 significance level, can we conclude that the guideline is still reasonable?
What is the probability that a cereal would be high calorie, given that it is high fiber? In other words, what is P (high calorie, given high fiber)?
Suppose that Total Revenue = 200Q and Total Cost = 80 + 50Q where Q, the quantity sold, is a random variable with expected value 20 and variance 4.
What is the probability that both defective lights will be found within three trials?
You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 95 percent confidence level and state that the estimated proportion must be within 2 percent of the population proportion.
a) Specify the null and alternate hypotheses for testing that the population correlation is negative. b) Calculate the estimate of the population correlation coefficient between X and Y.
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1% (indicate which test you are performing; show the hypotheses, the test statistic and the critical values and mention whether one-tailed or..
If garage is robbed, determine the probability doors were left open?
You are appraising the quality of diamonds for your importer. A diamond without a clear center (opaque center) shall be downgraded and sold at discount.
What is the mean and standard deviation of the sampling distribution of x-bar assuming that mean =20 and standard deviation equals the square root of 20?
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