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Prior to 2001, the operating system used by Apple for Macintosh desktop computers was completely proprietary. In 2001, Apple introduced a new operating system (OS X) based on Unix. What are three advantages to changing to a Unix-based operating system? What are three disadvantages?
21st Century Insurance Company claims that telephone calls for policy holder information are answered in at most 3 minutes. A random survey of 36 phone calls results in the mean 3.3311 and standard deviation 2.1788.
show that s2subp is an unbiased estimator of sigma2 and find its variance under the condition of following theorem. if
Mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard deviation is assumed to be σ = 3.6 hours. Based on this information, what would be the point estimate for μ?
A supervisor has noticed that sales for all departments world wide has been averaging $12,000 a month for a number of years. For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Manage..
q1. one hundred policyholders file claims with stressfree insurance. ten of these claims are fraudulent. claims manager
two uninsulated rigid tanks contain air. initially tank a holds 1 lbm of air at 1440degr and tank b has 2 lbm of air at
annual per capita consumption of milk is 21.6 gallons statistical abstract of the united states 2006. being from the
How does the efficiency of a regression predict the power of the t-test? How do robust standard errors change the comparison between hypothesis testing using OLS and robust regression? What does dependence in the e do to the t-test? what does non-no..
A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conclude, at the 0.10 level of significance, that the average trunk diame..
Construct a 95 percent confidence interval estimate of the average IQ score of all students at the university. Construct a 95 percent lower confidence interval estimate.
Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. (Round your answer to two decimal places.)
the average height of a random sample of 2000 women is 64 inches with a standard deviation of two inches.a what
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