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a) Write paragraph about the observed effect
b) State the theory you are working with
c) Write out the "predicted value" (remember y-hat?) equation, with the parameter estimates filled in.
d) Discuss the null hypothesis test of the slope coefficient.
e) Discuss confidence intervals of the estimated intercepts and slopes.
f) What is your RMSE? What does that mean? Of which parameter is it an estimate?
g) What is your estimate of the R2? What does that mean?
h) What is the difference between the column of numbers labeled "Std. Err." in the regression printout and the thing R calls the "Residual standard error".
A federal report find that a lie detector test given to truthful persons have a probability of 0.2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test. Suppose that all 12 applicants answer truthfull..
What is the difference between a sample and a population? When can the same information (e.g. the age of each of the ten students in our class) be considered both sample data and population data?
Which is relatively better: a score of 81 on a psychology test or a score of 56 on an economics test? Scores on the psychology test have a mean of 87 and a standard deviation of 9.
1.a manufacturer receives parts from two suppliers. an srs of 400 parts from supplier 1 finds 20 defective. an srs of
The distance (in miles) are as follows:32,18,44,29,25,38,14,21,and 12. Estimate the mean commute distance of all employees of the company.
in a recent survey concerning company sales and net earnings 15 companies responded. data analysis was computed letting
You were hired to do the development work for the local high school. The school has asked you to create a program to store quiz grades for the students of a class.
The sample yielded a mean content of 11.88 ounces, with a standard deviation of 0.24 ounces. Use a 0.05 level of significance and test to see if the machine is in perfect adjustment (perform all six steps of hypothesis testing, including p-values)..
A beverage company is trying to ?nd out the distribution of the breaking strength of their glass bottles. Fifty bottles are selected at random and tested for breaking strength, with the following results (in pounds per square inch):
He further recalled that Watson had heard the victim scream "No, Percy!" moments before the tragic murder. Holmes concluded that Major Bretton had killed Davidson. Inductive or Deductive?
To test whether the significant difference between two proportion test using large sample test.
SAT verbal scores are normally distributed with a mean of 412 and a standard deviation of 90. Use the Empirical Rule to determine what percent of the scores lie between 412 and 592.
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