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A confidence interval was used to estimate the proportion of statistics students that are female. A random sample of 72 statistics students generated the following 90% confidence interval: (0.438, 0.642). Using the information above, what total size sample would be necessary if we wanted to estimate the true proportion to within ?0.08 using 95% confidence?
A random variable has the density curve as in the graph below. Find The height of the density curve?
A survey of 600 non-fatal accidents showed that 111 involved the use of a cell phone. Find a point estimate for p, the population proportion of accidents that involved the use of a cell phone.
What is the probability that a worker at Random drives more that 15 miles to work if the distribution of all worker's mileage is a Normal Distribution that ranges from 4 miles to 26 miles?
Critically discuss the difference between the "skewedness" of the distribution of a dataset and its "kurtosis"? What is the expected value (EV) of an investment if there is a 20% chance of realizing a return of $20,000 or a 55% chance of realizing a..
In other words, what other variables might you collect that you might plausibly expect to have an impact on the change in test scores aside from income and the curriculum type?
Wildlife Hummingbirds Selasphorus sasin is the scientific name for what is commonly called "Allen Hummingbird" This beautiful hummingbird lives on the west coast of the United States and is named C.A. Allen
A mathematical placement test is given to all entering freshmen at a small college. A student who receives grades below 35 is denied admission to the regular mathematics course and placed in a remedial class.
A 2005 study found that 202 women held board seats out of a total of 1,195 seats in the Fortune 100 companies. A 2003 study found that 779 women held board seats out of a total of 5,727 seats in the Fortune 500 companies.
Use Are the data statistically significant at the given level of significance? Based on your answers, will you reject or fail to reject the null hypothesis?
What is the sample space for this process and evaluate the variance of the intelligence scores
Can researcher conclude that humidity has significant effect on eating behavior? Use two-tail test with α = .05. Calculate estimated Cohen's d and r2 to measure size of treatment effect.
A "random survey" was conducted of 3274 people of the "microprocessor generation" (people born since 1971, the year the microprocessor were invented). It was reported that 48% of those
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