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Given the following contingency table, conduct a test of independence at the 1% significance level using (a) the p -value approach and (b) the critical value approach.
Explain why the problem called "using the wrong sampling frame" might lead to a biased estimate of the abundance of cactus in the desert.
What sample size is needed if they wish to be within 5 percentage points of the actual?
surveys repeatedly show that about 40 of adults in the u.s. indicate that if they only had one child they would prefer
Let's say that we want to find the average height of all male college basketball players in the united states. we take a random sample of 100 players and find that the average height is 76 inches, and the standard deviation of our sample is 4 inch..
Why can it be argued that the formula for calculating r should be named the Edgeworth, rather than the Pearson, correlation coefficient?
The data file also contains data concerning the median selling price ($thousands). Construct a graph containing the line plot for both the number of sales.
assume the carrying capacity of the earth is 15 billion. use 1960s peak annual growth rate of 2.1 and population of 3
two towns both have a mean income for their residents of 30000. the standard deviation of incomes of residents in
The ship building association wishes to find out whether their welders earn more or less than $50,000 annually. A sample of 100 welders is taken
researchers investigated the issue of race and equality of access to clinical trials. the table below shows the
For the period from 1918 to the present, in a random sample of 13 wolves spotted in the region, what is the probability that 10 or more were male? What is the probability that 10 or more were female?
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
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