13. Mean: $2,025.25
Median: $2,209
Mode: none
14. Mean: $41.41
Median: $40.76
Mode: none
15. Mean: 3,670 psi
Median: 3,830 psi
Mode: 4,090 psi
16. Mean: 266 min
Median: 266 min
Mode: 260 min
17. a. less than
b. equal to
c. greater than
5. sample SD: 4
sample variance: 16
6. sample SD: 10
sample variance: 100
7. popn SD: 4
popn variance: 16
8. popn SD: 8
popn variance: 64
9. sample SD: 14
sample variance: 196
10. popn SD: 5
popn variance: 25
14. range: 25
sample SD: 8.43
5. The 40-week gestation period baby weighs less.
7. A 75-inch man is relatively taller than a 70-inch woman.
9. Felix Hernandez of the Seattle Mariners had the better year compared to his peers.
11. Will Power in the Indy Grand Prix had the more convincing victory.
13. Applicants must score at least a 239.
15. a.) 15% of observed males 3-5 months of age have a head circumference of 41.0cm or less.
b.) 90% of 2 y/o females observed have a waist circumference of 52.7cm or less.
c.) As age increases, the heights at each percentile are decreasing.
22. a.) z = -1.21
b.) Q1 = 9.15, Q2 = 9.95, Q3 = 11.11
c.) IQR = 1.96
d.) LF = 6.21, UF = 14.05
outliers: 5.7 < LF
25. UF = 574.25
3. a.) right-skewed
b.) Five-number summary: 0, 1, 3, 6, 16
4. a.) symmetric
b.) Five-number summary: -1, 2, 5, 8, 11
5. a.) 40
b.) 52
c.) y; variable y has a larger IQR
d.) symmetric / bell-shaped; the distance between Q1 and the median is approximately equal to the distance between Q3 and the median
e.) right-skewed; the minimum value and Q1 are both closer to the median, and the right whisker is longer than the left whisker
6. a.) 16
b.) 22
c.) y; variable y has a larger IQR
d.) yes; 30
e.) left-skewed; the maximum value and Q3 are both closer to the median, and the left whisker is longer than the right whisker