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The lengths of human pregancies are normally distributed with a mean of 268 days and a standard deviation of 15 days.
What is the probability that a pregnancy lasts at least 300 days?
For the sample of men, performance on the simulator task declined by an average of 2.9 points with s = 4.1. Is this a statistically significant change? Use a two-tailed test with = .05.
Many people think that job satisfaction in workplace is directly related to annual income. To check the validity of this assumption survey of 430 active working adults in U.S was taken that relates their job satisfaction to their annual income.
SAT Scores and the Central Limit Theorem. Assume that SAT scores are normally distributed with a mean of 500 and a standard deviation of 100.
Work through a simple regression calculation using intrinsic job satisfaction nd extrinsic job satisfaction. Select thirty data points to use for each group.
At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that:
A counselor is interested in determining if there is a relationship between children's scores on the racial attitude and preference test and their scores on the racial socialization test. She sampled a group of 10 children yielding the following r..
Suppose you obtain a 100 bag random sample by taking 25 subgroups of 4 bags each, the mean weight of the 25 subgroups was 16.00 ounces with a total of the subgroup ranges of 87.5 oz.
When the Sharpe Ratio for the market portfolio is 0.5, what risk-free rate Rf is the market anticipate? Draw on a diagram for the Capital Market Line derived from the above data. Make sure to clarify the intercept and the slope.
For these 4 questions below what would be the independent and dependent variables, the level of measurement and whether or not the variable is discrete or continuous.
Assuming that the standard deviation is known to be 121.8Ib use 0.05 significance level to test the claim that the population mean of all such bear weights is greater than 150 Ib
A pharmaceutical company has determined that if a new cholesterol-reducing drug is manufactured (introduced to the market) the following probability distribution will describe this drug's contribution to the company profits during the next six mon..
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
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