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# STA 101 : Statistics

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## Question:

1. During the recession that began in 2008, not only did some people stop making house payments, but they also stopped making payments for local government services such as trash collection and water and sewer services. The following data have been collected by an accountant who is performing an audit of account balances for a major city billing department. The population from which the data were collected represents those accounts for which the customer had indicated the balance was incorrect. The dependent variable, y, is the actual account balance as verified by the accountant. The independent variable, x, is the computer-generated account balance.

 X 280 12 29 67 94 122 108 240 413 144 22 Y 319 16 29 73 117 134 111 247 416 156 30

a. Compute the least squares regression equation.
b. If the computer-generated account balance was 100, what would you expect to be the actual account balance as verified by the accountant?
c. The computer-generated balance for Oliver Buxton is listed as 100 in the computer-generated account record. Calculate a 95% interval estimate for Mr. Buxton’s actual account balance.
d. Calculate also a 95% interval estimate for the average of all customers’ actual account balances in which a computer-generated account balance is the same as that of Mr. Jones (part c). Interpret your results.

2. Statistical analysis of has shown a strong negative correlation between skiing accidents and consumption of ice-cream in a data set of various countries in 2017. Are these statistical findings a proof of causal relationship between these two variables? Explain.

### Cite This Work

My Assignment Help (2021) STA 101 : Statistics [Online]. Available from: https://myassignmenthelp.com/free-samples/sta101-statistics/average-actual-account-balance.html
[Accessed 20 April 2021].

My Assignment Help. 'STA 101 : Statistics' (My Assignment Help, 2021) <https://myassignmenthelp.com/free-samples/sta101-statistics/average-actual-account-balance.html> accessed 20 April 2021.

My Assignment Help. STA 101 : Statistics [Internet]. My Assignment Help. 2021 [cited 20 April 2021]. Available from: https://myassignmenthelp.com/free-samples/sta101-statistics/average-actual-account-balance.html.

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