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A researcher is looking at the relationship between home-schooling and achievement. She is hypothesizing that the home-schooled children will score higher than non home-schooled children on a standardized achievement test.
a. What is the null hypothesis?
b. What is the alternative hypothesis? (Remember that every possibility must be covered between these two hypotheses).
c. Is this a one-tailed or a two-tailed test?
d. Write the alternative hypothesis so that it is a one-tailed test.
e. Write it as a two-tailed test.
Sample data are reported for 50 employees of small companies, 75 employees of medium companies, and 100 employees of large companies.
Compute a 99% confidence interval for the true average number of months taken by bankruptcy petitioners to acquire debts listed on their petitions.
At 1 excavation site 8641 pot shards have been found that have not presently been cleaned also identified. Define the probability.
In considering doing a logistic regression using the Enter method, it was suggested that I may want to consider doing a sequential LSR or stepwise logistic regression instead.
First step of analytical hierarchy process doesn't include?
A least squares linear trend line is just a simple regression line with the independent variable being time (months or years for example).
The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records
An issue that faces individuals investing for retirement is allocating assets among different investment choices. A study conducted 10 years ago showed that 65% of investors preferred stocks to real estate as an investment.
A fair coin is tossed four times and X is number of heads on first three tosses and Y on last three. What is the joint probability mass function of x and y? What is the marginal pmf? Are X and Y independent?
Set up hypotheses and test to find out whether or not population variance is larger than $100.
If someone had x=2 job changes, what does the least squares line predict for y, the annual salary?
Calculate GM's Altman Z-Score. Show your calculations. Based on your calculations, would you agree or disagree with Lutz that GM is over the worst? Explain in detail.
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