Elementary Statistics
12th Edition
ISBN: 9780321836960
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 14, Problem 4RE
Energy Consumption. Exercises 1–5 refer to the amounts of energy consumed in the author’s home. Each value represents energy consumed (kWh) in a two-month period. Let each subgroup consist of the six amounts within the same year.
| Year 1 | 3637 | 2888 | 2359 | 3704 | 3432 | 2446 |
| Year 2 | 4463 | 2482 | 2762 | 2288 | 2423 | 2483 |
| Year 3 | 3375 | 2661 | 2073 | 2579 | 2858 | 2296 |
| Year 4 | 2812 | 2433 | 2266 | 3128 | 3286 | 2749 |
| Year 5 | 3427 | 678 | 3792 | 3348 | 2937 | 2774 |
| Year 6 | 3016 | 2458 | 2395 | 3249 | 3003 | 2118 |
| Year 7 | 4261 | 1946 | 2063 | 4081 | 1919 | 2360 |
| Year 8 | 2883 | 2174 | 2370 | 3480 | 2710 | 2327 |
4. Energy Consumption: Run Chart Construct a run chart for the 48 values. Does there appear to be a pattern suggesting that the process is not within statistical control?
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Requesting all sections a to g answered for question 1.
1. The number of pounds of steam used per month by a chemical plant is thought to be related to the average ambient temperature (in F) for that month. The past year’s usage and temperatures are in the following table:
Month
Temp
Usage/1000
Month
Temp
Usage/1000
Jan
21
185.79
Jul
68
621.55
Feb
24
214.47
Aug
74
675.06
Mar
32
288.03
Sept
62
562.03
Apr
47
424.84
Oct
50
452.93
May
50
454.58
Nov
41
369.95
Jun
59
539.03
Dec
30
273.98
a. Assuming that a simple linear regression model is appropriate, fit the regression model relating stem usage (y) to the average temperature (x). What is the estimate of σ2?
b. What is the estimate of expected stem usage when the average temperature is 55 F?
c. What change in mean stem usage is expected when the monthly average temperature changes by 1 F?
d. Suppose that the monthly average temperature is 47 F. Calculate the fitted value of y and the corresponding residual.
e. Test for…
Chapter 14 Solutions
Elementary Statistics
Ch. 14.2 - Product Specs Table 14-1 lists process data...Ch. 14.2 - Prob. 2BSCCh. 14.2 - Prob. 3BSCCh. 14.2 - Prob. 4BSCCh. 14.2 - Prob. 5BSCCh. 14.2 - Prob. 6BSCCh. 14.2 - Prob. 7BSCCh. 14.2 - Prob. 8BSCCh. 14.2 - Prob. 9BSCCh. 14.2 - Prob. 10BSC
Ch. 14.2 - Prob. 11BSCCh. 14.2 - Prob. 12BSCCh. 14.2 - Prob. 13BBCh. 14.2 - Prob. 14BBCh. 14.3 - Prob. 1BSCCh. 14.3 - Prob. 2BSCCh. 14.3 - Prob. 3BSCCh. 14.3 - Interpreting a Control Chart After constructing a...Ch. 14.3 - Prob. 5BSCCh. 14.3 - Prob. 6BSCCh. 14.3 - Prob. 7BSCCh. 14.3 - Prob. 8BSCCh. 14.3 - Prob. 9BSCCh. 14.3 - Prob. 10BSCCh. 14.3 - Control Charts for p. In Exercises 512, use the...Ch. 14.3 - Prob. 12BSCCh. 14.3 - Prob. 13BBCh. 14 - Prob. 1CQQCh. 14 - Prob. 2CQQCh. 14 - Prob. 3CQQCh. 14 - Prob. 4CQQCh. 14 - Prob. 5CQQCh. 14 - Prob. 6CQQCh. 14 - Prob. 7CQQCh. 14 - Prob. 8CQQCh. 14 - Prob. 9CQQCh. 14 - Examine the following p chart for defective...Ch. 14 - Prob. 1RECh. 14 - Prob. 2RECh. 14 - Prob. 3RECh. 14 - Energy Consumption. Exercises 15 refer to the...Ch. 14 - Prob. 5RECh. 14 - Prob. 1CRECh. 14 - Prob. 2CRECh. 14 - Prob. 3CRECh. 14 - Prob. 4CRECh. 14 - Prob. 5CRECh. 14 - Prob. 6CRECh. 14 - Prob. 7CRECh. 14 - Prob. 8CRECh. 14 - Prob. 9CRECh. 14 - Prob. 10CRECh. 14 - FROM DATA TO DECISION Critical Thinking: Are the...
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