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Is there a difference in the total scores for women's and men's basketball games? A random sample of n1=55 women's games had a mean winning score of 78. Another random sample of n2=60 men's games had a mean winning score of 90. Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
What would be the most appropriate graphical representation to show the dispersion of new home prices in a particular area? Why?
A portfolio manager believes that tomorrow's foreign exchange rate of German marks per US dollar will be Normally distributed with mean 2.03 and standard deviation 0.08. Using the manager's numbers:
Calculate the test statistic (z-score) for the sample. What deccision should be made about the null hypothesis, and what decision should be made about the effect of the program.
What is the computed z-value for testing the null hypothesis that the proportion of successes in Population 1 exceeds the proportion of successes in Population
The best estimator or appreciative for the population proportion is 0.45. How large must the sample be?
A package of seeds states that the probability of germination is 0.92. For a package containing 75 seeds, the mean and variance of the number of seeds germinating are:
Calculate the standard deviation of BMI. Calculate the median BMI. The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes.
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
Suppose that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Let x (sample mean) be the mean life of range sample of 25 such bulbs.
Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was u, = 30 with a = 5, and Sarah had a score of X - 45. On the Spanish exam, the mean was u, = 60 with 0 = 6 and Sarah had a score of X = 65. For which class must Sarah ..
What is the minimum sample size you should use to assure that your estimate of will be within the required margin of error around the population p?
Write down the objective coefficient ranges for three components? Interpret these ranges for company management.
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