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53% of all recorded births are boys if 6 babies born in this hospital are selected at random find the probability that two of the babies selected are boys.
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
A random sample results in 1 = 20 with n1 = 100. The population standard deviation is σ1 = 6. Another sample was selected independently resulting in 2 = 22 with n2 = 100. The population standard deviation is σ2 = 7. Test that the population means ..
The average number of hours of sleep per night that a college freshman gets is 6.50 with a standard deviation of 1.80 hours. If 35 college freshmen are randomly chosen find the probability that they average at least seven hours of sleep per night.
The U.S. Congress enacted legislation in 2005 authorizing Block Grants to cities as part of an Anti-Crime initiative. The grant monies are to be used to hire additional police officers for conducting beat patrols in high crime areas.
SmartPeople is an organization that only admits people with IQ's in the top 98 percentile. What IQ score would a person need to be a member of SmartPeople?
Is there any statistically significant difference in how the drugs perform? If so, explain the effect. Use the post hoc tests as needed.
Horace Mann, principal of Jones Public School, has decided to construct a time series model to obtain a 2- and a 3-period moving average to forecast student enrollments for next term.
What advantage does correlation have over a cross-tab?
A lab test is 95% effective in detecting a disease. The test gives a false positive (reports the patient has disease when they do not) for 1 % of the healthy population tested.
What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?
Explain the concept of risk analysis and how monte carlo simulation can provide useful information for making decisions.
Create a 95% confidence interval for population mean. Is it sensible that population mean is 28 weeks? give explanation for your answer.
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