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A psychologist wants to determine if there is a linear relationship between the number of hours a person goes without sleep and the number of mistakes he/she makes on a simple test. The following data is recorded. Determine the regression line equation.
Hours without Sleep, x 32 38 48 24 46 35 30 34 42
Number of Mistakes, y 6 8 13 5 7 6 5 8 12
Utilizing a binominal experiment, that is each trail can be reduced to two outcomes, construct a binomial distribution.
Make an interval estimate the population means score for the daycare children so that you are 95% confident that the true mean is in your interval.
What proportion of sample means would be between 1.31 and 1.33 inches?
Is the gender distribution for theater goers significantly different from the distribution for the general college? Test at the .05 level of significance.
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
When performing a chi-square test for independence, explain how the "cell frequencies under the independence assumption" are calculated.
MATH1550H: Assignment: Question: what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?
Create a flow diagram for entire process. Include flow paths for students (solid lines) and prescriptions (dashed lines).
where the deviations εi are assumed to be independent and Normally distributed with mean 0 and standard deviation σ. This model was fit to the data using the method of least squares. The following results were obtained from statistical software.
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