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Population 1 mean = 36 and Population 2 mean = 45. Both population standard deviations are 10. Sample size (per group) 16. What is the probability that a t test will find a significant difference between means at the 0.05 level? Give results for both one- and two-tailed tests. Hint: the power of a one-tailed test at 0.05 level is the power of a two-tailed test at 0.10?
Determine x-bar and s for this data set. You may suppose the values for bulb life are normally distributed. Use traditional method to make your decision.
What is the probability that a sample mean will be within plus-or-minus two of the population mean for each of the following sample sizes?
the u.s.food and drug administration fda is responsible for approving new drugs. many consumer groups feel that the
What sample size is needed to estimate with 95% confidence the mean intake of calcium within 20 units of the true mean if the intake is from a normal distribution with a variance of 1900 units?
X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities:
Post-hoc fallacy is that condition where regression shows a high degree of correlation (R square is high), but there is no real cause-effect relationship between the independent and dependent variables.
mtv some students do homework with the tv on. anyone come to mind? some researchers want to see if people can work as
Abnormalities that might lead to cancer. Provide a descriptive statistic that could be used to estimate the number of women out of 1000 in this population.
1. assume your marginal tax rate combined federal state and local is 34.1 percent. how many extra dollars must you earn
Conduct necessary analyses using SPSS so you can answer the questions for the problem, "Three Group MANOVA," at the end of Chapter 10B.
expectation of the statistic that was proposed by Statistician - Based on the information collected in Tasks 1-8, which of the two statistics produces values which tends to be more concentrated about the expectation of the measurement?
the weight of a candy bar is n50 1. we take a sample of 4 candy bars and compute the sample mean. the sample mean
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