Probability the sample mean
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is:
Less than 74.
Between 74 and 76.
Between 76 and 77.
Greater than 77.
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When the data form the 2x2 matrix, the phi-coefficient is employed to determine effect size for the chi-square test for the independence. If other factors are held constant, how does sample size affect the values for phi and chi-square?
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Determine the standard error of the mean in this example? Compute the likelihood the sample mean is greater than 320 minutes? Estimate the likelihood the sample mean is between 320 and 350 minutes?
Specialty's senior sales forecaster predicted that the demand would be basically distributed with the mean as 20,000 units and that demand would be between 10,000 and 30,000 units with a 90% probability. Calculate the probability of quantity deman
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