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?
Using the sales forecaster prediction to calculate, what is the standard deviation for the demand distribution?
A school newspaper reporter decides to randomly survey 12 students to see if they attend Tet festivities this year. Based on past years, she knows that 18% of studetns attend Tet festivities. We are interested in the number of students who will at
At the fencing center, 60% of fencers employ the foil as their main weapon. We randomly survey 25 fencers at the fencing center. We are interested in the numbers that don't employ the foil as their main weapon.
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
Assume the probability that an item produced by the certain machine will be defective is 0.1. Determine the probability that the sample of 10 items will contain at most one defective item. Suppose that the quality of successive items is independen
The Menthol extracted from pepper mint oil which is a flavoring agent and it contains the C, H, and O. In one combustion analysis, 10.00 mg of the substance yields 11.53 mg H2O and 28.16mg CO2. Determine the empirical formula of menthol?
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