Answer the math problem Speech or Presentation Example | Topics and Well Written Essays - 500 words

Answer the math problem - Speech or Presentation Example (A) Perform a t-test testing whether CDC and Brinks have the same average collections per day for the area that they were responsible for (ie, not 1-A). Show your work, either via calculations or providing a log of your stata session (or other program) or the formulas you used in excel. Can you use the result to create an estimate of the total amount stolen from June 1979-April 1980 (10 months)? If you can, do so. If not, explain why. From the results, note that the p-value is 0.0001, for the absolute difference in the means. This implies that the mean of average collections between the two companies is statistically different at a significant level of 5%. The t test shows the statistical difference between either two variables or a variable and a constant but cannot be used for estimation. Therefore determining, the total amount stolen requires an estimation method, different from t-test such as regression. (B) Create a 95% confidence interval for the average amount stolen per month based solely on the difference between CDC and Brinks time periods (ie, use the same data as (A). Again, show your work, either via calculations or providing a log of your STATA session (or other program) or the formulas you used in excel. (D) Create a new variable called â€Å"winter† that is equal to 1 from November – February, and 0 otherwise. Create a second new variable called â€Å"summer† that is equal to 1 from June-August. Summarize these variables; what are their means and standard deviations? You are trying to decide whether to use T-Mobile, AT&T or Verizon as your cell phone carrier. You have data on average costs each month over a series of years for an individual who has similar phone habits (for data, texting and voice). The only difference is that this person travels internationally in the summer, and so has a higher bill then. (A) Load the data into your statistical program and create a variable that takes