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Provide an example of where you could use correlation in real life. Explain why a t-test is necessary before you accept this correlation as being real in the population.
Please cite references.
the fox tv network is considering replacing one of its prime-time crime investigation shows with a new family-oriented
Normally distributed with a mean of $70,000 and a standard deviation of $20,000. Twenty percents of the loans are larger than what amount?
If a difference exists in the means, wage adjustments must be made to bring the lower wages up to the level of the higher ones. Given the sample data on hourly pay below, what adjustments are called for?
A botanical researcher wishes to design a survey to estimate the number of birch trees in a study area. The study area has been divided into 1000 units or plots.
In a sample of 60 mice, a biologist found that 46% were able to run a maze in 30 seconds or less. Find the 99% limit for the population proportion of mice who can run that maze in 30 seconds or less?
The following ANOVA summary data are the result of a regression with sales per year (dependent variable) as a function of promotion expenditures per year (independent variable) for a toy company.
A coin is flipped 5 times in a row. What is the probability that it will come up heads all 5 times? For the data in question above, calculate the Sum of Squares Error (SSE).
A survey last week revealed that out of 400 viewers contacted, 94 watched the news on WBEN. Can we conclude that the percent of viewers has increased? Use the 0.05 significance level.
ocean fishing for billfish is very popular in the cozumel region of mexico. in the cozumel region about 45 of strikes
In a certain garage, there are three mechanics per work shift of eight hours. The garage is open 24 hours a day. Customers arrive according to a Poisson process with rate λ = 2.5 per hour. The time a mechanic takes to perform an arbitrary task is ..
Refer to Exercise 9.3. Find the equations of the lines that pass through the points listed in Exercise 9.1.
A jar contains marbles of different colors: 4 white, 6 black, 6 red, and 4 blue. On two random drawings, without replacement, find the probability that the first is black and the second is white.
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