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The avg. size of a farm in indiana county, penna, is 191 acres. the avg size of a farm in greene county is 199 acres. assume the data were obtained from 2 samples with standard deviations of 38 acres and 12 acres respectively, and the sample size of 8 and 10 respectively. cant it be concluded at alpha .05 that the average size of the famrs in the 2 counties are different? assume the populations are normallyh distributed.
Generate a 95% confidence interval for the difference in proportions of patients with hypertension between groups. Experimental (n=100) =14%
A probability value of .25 means that an event will occur:
The mean score for freshman on an aptitude test at a certain college is 800 with a standard deviation of 50. That is the probability that two groups of students selected at random, consisting of 36 and 49 students, respectively, will differ in the..
At your place of employment, 100 employees are randomly selected and asked the distance of their communte to work. From this group a mean of 15.2 is computed. Identify the following as either?
Set up the following null and alternative hypotheses for both factors and their interaction. You should have three verbal statements, not symbolized statements.
For commercial banks in each state, the U.S. Federal Deposit Insurance Corporation has determined the percentage of domestic assets. Construct a frequency distribution with 6 classes for this data.
Using one mean t test to determine whether or not to support the claim - hypothesis test that WORKS THE SAME as the z-test
Compute b1, slope of an OLS regression line using dollars spent as dependent variable (Y) and age as independent variable (X).
Suppose that 0.6 of the present 25,000 vehicle occupants killed in collisions were not wearing seat belts. There are about 170 million registered cars and trucks on the highway today.
Let X be a normal distributed random Variable with u=100 and o=10. the probability that X is between 70 and 100 is:
Nielsen publishes a weekly ranking of television programs as well as a weekly ranking of four major networks: ABC, CBS, NBC, and Fox. What kinds of decision or actions are based on the Nielsen rankings?
We forecast that 20% of group 1 and 30% of group 2 will experience outcome. If we recruit the equal number of individuals in each of the groups, how many individuals do we need to study?
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