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A firm wanted to see if there was a significant difference between two neighboring communities in terms of the mean number of members per household. A random survey of 100 households in the first community showed the mean household size was 3 with a standard deviation of 5. In the second community, a random survey of 90 households showed the mean household size was 4 with a standard deviation of 6. Assuming a significance level of .01, test the hypothesis that the two communities are statistically equivalent with respect to household size.
Calculate the mean and standard deviation of the sample mean based on data from 100 stores.
How does the efficiency of a regression predict the power of the t-test? How do robust standard errors change the comparison between hypothesis testing using OLS and robust regression? What does dependence in the e do to the t-test? what does non-no..
Post a behavioral research situation that could use a Pearson coefficient research study and a chi square research study to the Discussion Area.
a cardiologist has a device that measures prothrombin clotting times protimes of patients who are taking the blood
Find the probability that the number of who consider themselves basketball fans is :
q1. following are the total scores of three subjects of seventy four year 8 students from a highschool.10nbspnbsp 1 4 6
Find the percentage of the 1000 enemy that will be destroyed.
There are 10 questions on a true-false test. A student feels unprepared for this test and randomly guesses the answer for each of these.
what is the probability that an organization selected at random will have at least one of the three types of benefits?
Mean and standard deviation are 584.6 and 34.28
question a process for the manufacture of penicillin was studied. there were five variants of the basic process being
Below are one hundred pseudorandom numbers from a uniform pdf. Set up and test the appropriate goodness-of-fit hypothesis. Let α = 0.05.
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