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Suppose that X is a continuous random variable with a probability distribution f(x) = (2x)/25 where x is between 0 and 5 (inclusive). Now let Y = 3x + 5 and domain be 5 ≤ y ≤ 20. Find:
a) P(Y < 15)
b) E(Y)
estimating the confidence interval for population mean.the superintendent wants to determine the average amount of
Compute the 95% confidence interval on the population mean if a sample of 1000 is taken and the sample mean is found to be 15.95 and standard deviation is 4.2.
What sample size is needed to estimate the proportion of Americans who favor tougher gun control with 95% confidence and maximum error of 3%. Assume past studies indicted that the proportion is around 40%.
For ease in calculating your statistics, you can either hand enter the data into Excel or use the Student Webfile file Judge from the Cengage website.
If the sample size is 36 with three treatment means (response variables) and you are performing an ANOVA, then the degrees of freedom for the error term will be:
At.01 significance level, is there relationship between job pressure and age?
A shipment of 500 dolls is received by Panda Importers. The quality control manager selects a random sample of 75 to test. Five are bound to be defective. Construct a 90 percent confidence interval for the population proportion of defective dolls ..
what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
Suppose the national average for all young adults is 3.7 hours, and the magazine wishes toclaim that their subscribers exercise more on average. State the relevant hypotheses to test this claim. Specifically define any symbols you use.
Determine the probability of a positive economic trend given an increasing employment. Are employment and economic trend independent?
The Bureau of the Census reports that the average commuting time for citizens of both Baltimore, Maryland, and Miami, Florida is approximately 29 minutes (uMiami=29 and uBaltimore=29 minutes).
What is the probability a random sample of 75 students will provide a sample mean Sat score within 20 of the population mean?
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