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Suppose that the probability that a child living in an urban area is the US is obese is 20%. A social worker sees 15 children living in urban areas.
What is the probability that none are obese?
Population blood pressure (BP) of patients is normally distributed, with a mean of 127, and standard deviation of 8. A random sample of 49 patients in the hospital found an average BP of 125.
Calculate the least square estimates of the slope and intercept. What is the estimate ofσ2? Find the estimate of the mean deflection ifthe stress level can be limited to 69%.
The sample mean is at the 5th percentile for the SDSM? What is the sample mean? Give your answer correct to two decimal places.
Ffor ten randomly selected employees of a company is = 117 - 1.02x. Predict the job performance rating for an employee whose attitude rating is 55.
The samples do indicate that university A's students are younger than university B's; but is the difference significant at the 1% level?
A state survey investigates either the proportion of 8percent for employees who commute by car to work is higher than it was five years ago.
59% identify NASCAR as their favorite type of racing. Suppose four auto racing fans are randomly selected. What is the probability that all four have NASCAR as their favorite?
Describe the basic characteristics of a normal distribution and the normal curve. What are z scores and how are they used in relation to distributions and raw scores?
question the null and alternative hypotheses areh0 p1 - p2 0h1 p1 - p2 ne0a sample of 200 observations from the
a jobs are sent to a printer at an average of 4 jobs per hour.i what is the expected time between jobs?ii what is the
How to decide whether your test should be one-tailed or two-tailed/directional or non-directional. Gives an example of each type, with an explanation of why it is/is not directional.
Is there any significant relationship between gender and the variable IQcat? If so, what is it and is the mean exam grade significantly larger than 75?
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