Determine effect size for the chi-square test
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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Come up with an expression that the probability of Z will still be null after this. At the end of this procedure, what is the expected size of Z?
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Discuss what is measured through the sample standard deviation. Calculate the estimated standard error for the sample mean and explain what is measured by the standard error.
A two-tailed test of hypotheisis was conducted and 60 values were above the median. Computed z=1.61. At the 0.05 level, what is the decision regarding the null hypothesis?
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.
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:
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