Question
Statistic Std. Error X2 = Age Mean 56.71 .826 95% Confidence Interval for Mean Lower Bound 55.09 Upper Bound 58.34 5% Trimmed Mean 57.09 Median
Statistic | Std. Error | ||
X2 = Age | Mean | 56.71 | .826 |
95% Confidence Interval for Mean | Lower Bound | 55.09 | |
Upper Bound | 58.34 | ||
5% Trimmed Mean | 57.09 | ||
Median | 60.00 | ||
Variance | 218.944 | ||
Std. Deviation | 14.797 | ||
Minimum | 20 | ||
Maximum | 89 | ||
Range | 69 | ||
Interquartile Range | 19 | ||
Skewness | -.518 | .136 | |
Kurtosis | -.499 | .271 |
Question background: Let's now focus on CFIs' age (X2 in the Research Project 1 data set). Use your statisticalsoftware program to acquire the sample's mean, SE, and 95% CI. According to the FAA, themean age of all CFIs ism = 48.0. Note that the sample mean age is M= 56.7 (note that N=321because19CFIsdidnotreporttheirage).
Hereisthequestion: Doesthesamplemeanage differ significantly fromthepopulation mean age?
- WritethenullandalternativehypothesesthatcorrespondtothisRQ?
- Use the 95% CI to determine if you will fail to reject or rejectthenull hypothesis. Explain.
- Interpretthe95CIinthecontextofthegivenresearch setting.
- Doyouthinkthecorrespondingaccuracyinparameterestimationishighorlow?Explain.
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