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An urn contains w1 white and b1 black balls. A second urn contains w2 white and b2 black balls. A ball is selected at random from the first urn and placed in the second urn. Then a ball is selected from the second urn.
Find:
1. Probability that is it white.
2. Assume that the ball selected from the second urn is white. Find the probability that it came from the first urn.
let x be a continuous random variable with density fxs ks-6 for s 1 and fxs 0 for sa determine the value of the
Find the expected value when you pick 4 and when you pick 5, betting $1 each time. Based on your results from parts a and b, are you better off picking 4 numbers or picking 5? Explain your reasoning.
In a random sample of 10 on-line statistics students, information was collected about their minutes studied and their chapter test scores. Is this relationship positive, negative or no relation?
Find the test statistic, p-value and critical value and state a final conclusion. Sample data: n=40, mean of the values in a sample = 117, assume that the standard deviation = 14 and the significance level = 0.05
What is the value of the population mean? What is the best estimate of this value?
Regarding four scales referring to levels of measurement: Nominal, Ordinal, Interval and Ratio. Please pick one and discuss one level of measurement, and briefly describe how you would use that type of measurement in a study.
Compute the test statistic. At 95% confidence using the p-value approach, test to see if taking the course actually increased scores on the driving exam.
The standard deviations s1 and s2 can be used when Ó1 and Ó2 are unknown and you believe that the underlying distribution is normal. Then, you would use s1 and s2 with the t-test for hypothesis testing.
Discuss how t test can be employed in hypothesis testing by the use of directional vs. nondirectional hypotheses. Discuss types of research where using the t statistic may be an appropriate alternative to using a z-score.
he probability is 1 in 4000000 that a single auto trip in the united states will result in a fatality. over a lifetime
Add line-of-best fit (trend line/linear regression line) to your scatterplot. Write down the equation of the trend line below.
lies damned lies and statistics is a phrase describing the persuasive power of numbers particularly the use of
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