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Question
Correlation is a common statistic to measure a general linear relationship between two variables. Explain why correlation does not equal causation. Describe the data characteristics necessary to calculate a Pearson correlation coefficient. Design a study that would apply the Pearson correlation coefficient as an appropriate statistic.
Hurricane hitting the eastern coast of India· follows Poisson with a mean of 0.5 per year. Determine the probability of more than three hurricanes hitting.
an elementary school is offering 3 language classes one in spanish one in french and one in german. these classes are
Then repeat that trial eleven more times for a totalof twelve trials and 120 tosses. Did you ever get seven (or more) heads in a trial often tosses?
Assuming this is true, determine the expected spread in the number (i.e., mean ± 1 standard deviation) of home buyers (from sample of 20 home buyers) that will do some remodeling to their home within the first 5 years of home ownership.
A 25-question multiple-choice questionnaire has four choices for each question. Suppose an applicant is an expert and knows all the correct answers.
Write a 350- to 700-word review of the article. Your review should discuss how the SOX Act may affect ethical decision making in today's business environment, and the criminal penalties for which the act provides.
A receiver in the ship's control room receives R = V +X, The random variable X is a Gaussian (0, √3) noise voltage that is independent of V. The receiver uses R to calculate a linear estimate of the telemetry voltage:
Why is it useful to know the power of a test?- Explain the difference between the p-value and the significance level α.
Let X1, ... , Xn be i.i.d. r.v.'s with (?nite) unknown mean m and (?nite) known variance s 2, and suppose that n is large. i) Use the CLT to construct a con?dence interval for m with approximate con?dence coef?cient 1 - a;
On January 11, 2005, the Gallup Organization released the results of a poll investigating how many Americans have private health insurance.
assume that the paired data came from a population that is normally distributed. construct a 95 confidence interval for
Scores are normally distributed with a mean of 460 and standard deviation of 80. The top 2.5 percent of the applicants would have a score of at least.
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