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Out of 1000 people surveyed, 600 belonged to urban areas and rest to rural areas. Among 500 who visited other states , 400 belonged to urban areas. Test 5 % level of significance whether area and visiting other state are dependent.
What was the purpose of calculating a Cohen's d? When is a Cohen's d calculated? Interpret d=.90. What does it mean in this example?
Calculate estimated Cohen's d to measure size of treatment effect.
He would like to determine whether there are more units produced on the afternoon shift than on the day shift.
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
Let be the average of the pay you receive for the first and second week. Find the sampling distribution
Illustrate by computation that, for straight -line regression of Y on x, β1= 0.
Problem based on combinatory - how many different license plates are possible?
What is the approximate permutation test P-value and What is the permutation test P-value for testing the equality of the means versus the hypothesis that the mean change for the treatment group is larger than the mean treatment for the control gro..
What is the best predicted IQ of the wife, given that the husband has an IQ of 105 ? Use a significance level of 0.05.
Do the data indicate a significant difference? Test with ∝ = .05.
Construct a 95% confidence interval estimate for the average waiting time of all the patients who visit this doctor. Assume the population of waiting times is normally distributed.
Compute the mean, median, mode and standard deviation for the following discrete probability distribution.
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