Question
You intend to estimate a population mean μμ with the following sample. 52.2 47.1 54.7 36.4...
You intend to estimate a population mean μμ with the following sample.
| 52.2 |
| 47.1 |
| 54.7 |
| 36.4 |
| 54.2 |
| 68.3 |
| 38 |
| 49.9 |
| 31 |
You believe the population is normally distributed. Find the 95%
confidence interval. Enter your answer as an
open-interval (i.e., parentheses)
accurate to twp decimal places (because the sample data are
reported accurate to one decimal place).
95% C.I. =
Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.
Homework Answers
Answer #1
ANS.
| Obs. | X | X^2 |
| 1 | 52.2 | 2724.84 |
| 2 | 47.1 | 2218.41 |
| 3 | 54.7 | 2992.09 |
| 4 | 36.4 | 1324.96 |
| 5 | 54.2 | 2937.64 |
| 6 | 68.3 | 4664.89 |
| 7 | 38 | 1444 |
| 8 | 49.9 | 2490.01 |
| 9 | 31 | 961 |
| SUM = | 431.8 | 21757.84 |
| MEAN = | 47.97778 |
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