3.4

5 -.303, -.4255, 40 week baby weighs less

7 man is relatively taller

9 Felix Hernandez had the better year because -1.913 > -2.260

11 Ryan is better in the 200-meter race because -3.050 > -3.387

13 239

15

  1. A percentile rank of 15% means that 15% of males 3-5 months of age head circumference are less than or equal to 41 cm and 75% of the circumferences are greater. So 75% of males 3-5 months head circumferences are larger than 41 cm.

  2. A percentile rank of 90% means that 90% of females 2 years of age waist circumference is less than or equal to 52.7 cm and 10% of the waist circumferences are greater. So 10% of females 2 years of age waist circumferences are larger than 52.7 cm.

  3. type answers

22

  1. type answer

  2. Q1=8.65, Q2=10.0, Q3=12

  3. IQR=3.35

  4. LF= 3.625, UF= 17.025, no outliers

25 type answer

3.5

3

  1. skewed right because the median is to the left of the center of the box and the right whisker is substantially longer than the left whisker

  2. min= 0, Q1=1, Q2=3, Q3=6, max=16. five number summary: (0,1,3,6,16)

4

  1. symmetric because the median is in the center of the box and the right whisker is equal to the left whisker.

  2. min= -1, Q1=2, Q2=5, Q3=7, max=11. five number summary: (-1,2, 5, 7, 11)

5

  1. 40

  2. 53

  3. y because it has a larger range than x

  4. symmetric

  5. skewed right

6

  1. 16

  2. 24

  3. y because it has a larger range than x

  4. yes, 30

  5. skewed left

7

dat1 <- c(60,68,77,89,98)

boxplot(dat1)

8

dat2 <- c(110,140,157,173,205)

boxplot(dat2)

9

dat3 <- c(42,43,46,46,47,
         47,48,49,49,50,
         50,51,51,51,51,
         52,52,54,54,54,
         54,54,55,55,55,
         55,56,56,56,57,
         57,57,57,58,60,
         61,61,61,62,64,
         64,65,68,69)

  1. (42, 49.5, 54.5, 57.5, 69)

boxplot(dat3)

  1. skewed right