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Course 35815
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The President of the ABC Manufacturing Co. believes that the amount of electrical power used in his plant depends on the outside temperature during the day, and the number of units produced that day.A random sample of 5 days was selected.The power usage (Y, in thousands of kilowatt hours of electricity), the production on that date (X1, in thousands of units), and the temperature (X2, in °F) have been recorded:
|
|
| |||
|---|---|---|---|---|---|
| 8 | 25 | 75 | |||
| 9 | 28 | 77 | |||
| 10 | 28 | 80 | |||
| 13 | 31 | 81 | |||
| 13 | 33 | 82 |
Run a regression of profits (Y) against revenues (X1) and number of employees (X2) for the airline industry using the data in the following table:
|
|
| |||
|---|---|---|---|---|---|
| 2 | 17 | 78 | |||
| 5 | 27 | 80 | |||
| 6 | 31 | 84 | |||
| 8 | 33 | 85 | |||
| 10 | 40 | 87 |
The economists want to analyze the relationship between outside temperature and heating cost. During one week in March they measured the average daily temperature X and the amount of money required daily to purchase the fuel needed to heat a two-bedroom house (Y). The results are as follows:
| Celsius temperature | Cost of fuel to heat the house ($) |
|---|---|
| 1 | 18 |
| 4 | 18 |
| 5 | 18 |
| 8 | 15 |
| 9 | 13 |
The economists want to analyze the relationship between outside temperature and heating cost. During one week in March they measured the average daily temperature X and the amount of money required daily to purchase the fuel needed to heat a two-bedroom house (Y). The results are as follows:
| Celsius temperature | Cost of fuel to heat the house ($) |
|---|---|
| 3 | 20 |
| 4 | 19 |
| 5 | 15 |
| 6 | 12 |
| 9 | 10 |
According to basic economics as the price of a product decreases, the demand for it will increase.Listed below is the number of units demanded (Y variable, in thousands) and the price (X variable, in $):
| Price (in $) | Demand (in thousands of units) |
|---|---|
| 3 | 18 |
| 3 | 16 |
| 9 | 14 |
| 10 | 15 |
| 7 | 10 |
22, 23, 18, 32, 23
The median of these data is:
20, 27, 35, 19, 29
The kurtosis of these data is:
(show two decimal places, for example: 1.23)
22, 23, 18, 32, 23
The skewness of these data is:
(show two decimal places, for example 1.23)