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Calculate the mean and the standard deviation of the sampling distribution of possible sample proportions for each combination of sample size (n) and population proportion (p).
a. n = 400, p = .5.
b. n = 1600, p = .5.
Determine the probability that a computer purchased from this retailer has neither a read-write CD nor a DVD drive - Determine the probability that a computer purchased from this retailer does not have a DVD drive.
Many people find the calculations tedious or complex and most companies offering annuities also offer calculators to see the effects of your proposed investment. An example is given here.
the manager of a computer software company wishes to study the number of hours junior executives by type of industry
They select every 20th person from the list until a sample of 100 is obtained. They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
Describe the nonequivalent control group pretest-posttest design. Why is this a quasi-experimental design rather than a true experiment?
a ball is dropped and lands randomly on a square with length 1 meter.a find the expected distance from the nearest edge
A random variable is normally distributed, with (population mean)= 300 pounds and (standard deviation) = 50 pounds. How small can a simple random sample be if the standard error of the mean can be no more than 20 pounds?
Find the equation of the least squares regression line that models the relationship between square footage and rental amount and interpret the meaning of the coefficients.
Construct a 95% confidence interval for the mean age of all customers, assuming that the assumptions and condi- tions for the confidence interval have been met.
What is the probability that One member of the committee lives in northern Kentucky and the others live in Ohio and At least 1 member of the committee lives in northern Kentucky?
A poll found that 38% of male voters and 46% of female voters support a particular candidate. To test whether this candidate has equal levels of support between male and female voters, the null hypothesis should be:
the national center for health statistics reports that the mean systolic blood pressure for males 3 to 44 years of age
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