3.4

5 z score for 34-week gestion baby = -0,30 z score for the 40-week gestation baby = -0,43 The 40-week gestation baby weighs less relative to the gestation period.

7 The man is taller.

9 Clayton had the better year beacause his ERA was 2.30 below National League mean, vs. Hernandez who was 1.91 below the American League mean.

11 Z for the 100 m race = -3.38 and Z for the 200 m race= -3.05 Therefore, Ryan did better in the first race cause the standard of deviation was greater than the 200 m race.

13 The minimum score that an applicant must make on the test to be accepted is 239.

15

  1. 15% of males aged 3-5 months have a head circumference of 41.0 cm or less. 85% of males aged 3-5 months have a head circumference of more than 41.0 cm.

  2. 90% of females aged 2 have a waist circumference of 52.7cm or less. 10% of females aged 2 have a waist circumference of more than 52.7cm.

  3. As the males get older, the height decreases at each percentile. This implies that as they get older, they get taller.

22

  1. -0.83

  2. Q1 = 9.5 Q2 = 10 Q3 = 11

  3. 1.5

  4. Upper fence= 13.25 Lower fence= 7.25 There are no outliers.

25 The cutoff point is 574 minutes.

3.5

3

  1. Skewed right

  2. 0, 1, 3, 6, 16

4

  1. symmetric

  2. 0, 3, 5, 8, 11

5

  1. 40

  2. 52

  3. y

  4. symmetric

  5. skewed right

6

  1. 17

  2. 22

  3. y has more disperson because it ranges from approximately 9 to 29, whereas x ranges from approximately 4 to 28.

  4. 30

  5. Skewed left because the tail is longer on the 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, 50.5, 54.5, 57.5, 69

boxplot(dat3)

  1. symmetric with an outlier