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A study was done at a university in Virginia to determine the effect of temperature on the germination of broccoli seeds. At 5?, 10 out of 40 broccoli seeds germinated. At 15?, 19 out of 40 broccoli seeds germinated. Calculate a 95% confidence interval for the difference between the true proportion of seeds that germinate at 5? and the true proportion of seeds that germinate at 15?, using p^5°C-p^15°C. Assume the requirements for the confidence interval are satisfied.
What are the lower and upper bounds of your confidence interval?
How many subsets of size 3 does a set of size 5 possess? How many subsets does a set of size 5 possess?
This linear regression model was fitted to a sample of size 50 to produce the following regression equation: yhat = 145 + 1.2x1 + 300x2.
1. define the random variable x to be the time you get home on thursday. a is x a discrete or continuous random
(a) Let random variable X, have an Exponential distribution with pdf : f(x) = βe-xβ, x > 0. Derive mgf of X, denoted as mX(t). Be sure to note the bounds on constant, t.
Effect of a new training program on time taken to complete a task, measured by a "before" and "after" test
Medical studies have shown that 10 out of 100 adults have heart disease. When a person with heart disease is given an EKG test, a 0.9 probability exists that the test will indicate the presence of heart disease.
(a) An approximate 99% con?dence interval for an unknown proportion p is pˆ plus or minus its standard error. (b) When performing a large-sample signi?cance test for a population proportion, the t distribution is used to compute the P-value.
If a pet store wishes to determine the level of customer satisfaction with its services, would it be appropriate to conduct an experiment? Explain.
To compare the difference in the BMI before and after the diet program, which statistical method should be used?
The traveling salesperson randomly selects 5 apartments in your building to visit. What is the probability that she visits both you and your neighbor bill?
In addition to its role in the formulas of the standard errors of the regression estimates, what is the significance of s2?
historically the average time it takes jessica to swim the 200 meter butterfly is 148.4 seconds. jessica would like to
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