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The mean and median selling price of existing single-family homes sold in October 2005 were (in no particular order) $216,200 and $265,000. Which of the following most accurately explains which is the mean and which is the median and why?
The mean sat verbal score is 401, with a standard deviation of 97. Use the empirical rule to determine what percent of the scores lie between 207 and 498.
A recent study of cardiovascular risk factors reports that 30% of adults meet the criteria of hypertension. if 15 adults are assessed, what is the probabiliy that?
Write the regression. Interpret the regression constant and regression coefficient. Forecast a value for monthly salary.
A recent national study showed that approximately 30% of college students binge-drink. Let x equal the number of students in a random sample size of n=12 who binge drink. Find the probability that
A box contains six parts. Two of the parts are defective and four are ok. If three of the six parts are selected from the bin, how large is the sample space?
What is the point estimate of the population standard deviation?
In a manufacturing process, the diameter of the steel rods is the product characteristic. A random sample of 25 steel rods is taken and sample mean is 8.88 cm.
Can people really identify their favorite brand of cola? Volunteer tasted coca-cola classic, pepsi, Diet coke, and Diet pepsi, with the results shown below.
In the solution to this problem, what is n? p? q? Does it appear that both np and nq are larger than 5? Why is this an important consideration?
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
Is this a proper probability density function? How do you know? Find the mean, variance, and standard deviation of x, showing your work.
Point to at least two directional and nondirectional hypotheses you would like to test associating either to your current job or job you would like to do after graduation.
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