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An article in the national newspaper on March 16, 2013 stated that nearly 45 percent of all Canadians have brown eyes. A random sample of University students found 31 with brown eyes. We test
Ho: p=.45
Ho:p=/.45
(a) What is the -statistic for this test?
(b) What is the P-value of the test?
The makers of the Plus 20 Hard card, a plug-in hard disk unit on a PC board, have recently done a marketing research study in which they asked two independently
a manufacturer claims that the batteries it makes will last 18 hours with a standard deviation of 1.5 hours. if the
Suppose the mean test scores for a college enter exam is normally distributed with mean = 78 and standard deviation = 12. a). If an individual student is selected at random, what is the probability that this student's score is over 80?
Define the probability density and cumulative probability function for an absolutely continuous random variable. Which of these functions is analogous to the probability mass function of a discrete random variable?
at an emergency room one out of every four urgent patients triaged is followed by another urgent patient while only one
economics is about allocation of limited resources to their best use. similar to the rest of economy healthcare sector
Each operator proceeds from one treatment to the next in a random order, and the times for completion of the operation are shown here. At the 0.05 level, determine whether the treatment effects of the two layouts could be zero.
Compute the estimated mean of the population (calculated as the mean of the sample means). Is your estimated population mean biased from the true population mean?
a company produces bolts for large-scale construction projects. the shear strength x of the bolts is assumed to be a
The following probability matrix contains a breakdown on the age and gender of U.S. physicians in a recent year, as reported by the American Medical Association
A random sample of 12 single men were asked if they would welcome a woman asking them for a date. using the binomial probability table, find the probability that: none of the men will say yes.
a researcher would like to know whether there is a consistent predictable relationship between verbal skills and math
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