Week 6 - Group Assignment
Qiana.Reynolds
SHORT TITLE OF PAPER |
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Running head: DESCRIPTIVE STATISTICS |
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Descriptive Statistics
Lee DeVaughn
QNT/561
January 16, 2017
Dr. Heidi Carty
Descriptive Statistics
Weight
Distribution: State if not normally distributed
Central Tendency: Mean = 149 Lbs. |
Dispersion: Standard Deviation = 30 Lbs |
Number: 100 |
Min/Max: 99 pounds and 234 Lbs. |
Confidence Interval: 144 to 155 Lbs. |
Age
Distribution: State if not normally distributed
Central Tendency: Median = 36 years |
Dispersion: Interquartile Range = 20.5 years / 2 = ± 10 years |
Count: 100 |
Min/Max: 18 years and 74 years |
Confidence Interval: Not applicable (data is not normally distributed) |
See the histogram in Appendix A, and descriptive statistics in Appendix B. A scatter plot is in Appendix C.
Descriptive Statistics Interpretation
Numeric Variable Weight
Body Weight
One hundred subjects were randomly selected. Their body weight was observed between 99 and 234 pounds. Their average weight was 149 pounds, with a variation of plus or minus 30 pounds. One half or more were above 149 pounds. There is 95% confidence that the population body weight average is between 144 and 155 pounds.
Numeric Variable Age
Age
The data was significantly skewed. One hundred subjects were randomly selected. Their ages were between 18 and 74 years, with a variation of plus or minus 10 years. One half or more subjects were 36 years of age or older. The middle half of the subjects’ ages fell between 27 and 47 years. The most frequent age was 36 years.
Appendix A
Age and Weight
Appendix B
Charts and Tables
Appendix C
Descriptive Statistics
Descriptive Statistics: Weight, Age
Variable Percent Mean StDev Min Q1 Median Q3 Max
Weigh 100 168.77 16.01 99 151.1 172 180 234
Age 100 17.82 2.40 18 16 17 20 74
N for
Variable Range IQR Mode Mode
Weight 151.1 39.2 NA NA
Age 16 25.5 2 18
CI for Two Variances: Price, Distance
Method
Null hypothesis σ (Weight) / σ (Age) = 1
Alternative hypothesis σ(Weight ) / σ(Age) ≠ 1
Significance level α =
F method was used.
Statistics
95% CI for
Variable N StDev Variance
Weight 155 16.01 1011.1
Age 30 2.40 33.3
Ratio of standard deviations =
Ratio of variances =
_1546107177.xls
Chart1
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17.8181818182 |
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Sheet1
Time | Age | Weigth(lbs) |
0 | 15 | 170 |
1 | 16 | 150 |
2 | 17 | 151 |
3 | 18 | 152 |
4 | 19 | 151.5 |
5 | 20 | 172 |
6 | 21 | 175 |
7 | 22 | 175 |
8 | 15 | 180 |
9 | 16 | 180 |
10 | 17 | 200 |
mean | 17.8181818182 | 168.7727272727 |
SD | 2.4 | 16.01 |
median | 17 | 172 |
Q1 | 16 | 151.5 |
Q3 | 20 | 180 |
interquartile | 4 | 28.5 |
Time | Age | Weigth(lbs) |
0 | 15 | 170 |
1 | 16 | 150 |
2 | 17 | 151 |
3 | 18 | 152 |
4 | 19 | 151.5 |
5 | 20 | 172 |
6 | 21 | 175 |
7 | 22 | 175 |
8 | 15 | 180 |
9 | 16 | 180 |
10 | 17 | 200 |
mean | 17.8181818182 | 168.7727272727 |
SD | 2.4 | 16.01 |
median | 17 | 172 |
Q1 | 16 | 151.5 |
Q3 | 20 | 180 |
interquartile | 4 | 28.5 |
Sheet1
_1546107123.xls
Chart1
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2 | 2 |
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Sheet1
Time | Age | Weigth(lbs) |
0 | 15 | 170 |
1 | 16 | 150 |
2 | 17 | 151 |
3 | 18 | 152 |
4 | 19 | 151.5 |
5 | 20 | 172 |
6 | 21 | 175 |
7 | 22 | 175 |
8 | 15 | 180 |
9 | 16 | 180 |
10 | 17 | 200 |
mean | 17.8181818182 | 168.7727272727 |
SD | 2.4 | 16.01 |
median | 17 | 172 |
Q1 | 16 | 151.5 |
Q3 | 20 | 180 |
interquartile | 4 | 28.5 |
Time | Age | Weigth(lbs) |
0 | 15 | 170 |
1 | 16 | 150 |
2 | 17 | 151 |
3 | 18 | 152 |
4 | 19 | 151.5 |
5 | 20 | 172 |
6 | 21 | 175 |
7 | 22 | 175 |
8 | 15 | 180 |
9 | 16 | 180 |
10 | 17 | 200 |
mean | 17.8181818182 | 168.7727272727 |
SD | 2.4 | 16.01 |
median | 17 | 172 |
Q1 | 16 | 151.5 |
Q3 | 20 | 180 |
interquartile | 4 | 28.5 |