k8— title: “HW4_skel” author: “Harrel Blatt” date: “September 20, 2016” output: html_documenta
—

3.4

5 -.30; -.43 –> the 40 week baby weighs less relative to the gestation period.

7 The man would be relatively taller.

9 Clayton Kershaw had the better year because his ERA was 2.30 standard deviations below the mean while his peer was only 1.90 standard deviations below the mean.

11 Ryan swims better in the 100 m backstroke because his time is 3.38 standard devations below the mean.

13 239

15

  1. 15 % of males 3 to 5 months of age have less than a 41.0 cm head circumference. 85% have larger.

  2. 90% of 2 year old females have a waist circumference of 52.7 or less. 10% have larger.

  3. The height at each percentile get smaller which means that the males are getting taller.

22

  1. Blackie’s hemoglobin of 7.8 is 1.2 standard deviations below the mean.

  2. Q1 is 8.8 Q2 is 9.9 and Q3 is 11

  3. IQR is 2.2

  4. lower fence: 5.5 Upper fence: 14.3 There are no outliers.

  1. The cutoff time is 574.

3.5

3

  1. Skewed right

  2. Minimum: 0, Q1: 1, Median: 3, Q3: 6, Maximum: 16

4

  1. Bell shape

  2. Minimum: -1, Q1: 2, Median: 5, Q3: 7, Maxiumum: 11

5

  1. 40

  2. 52

  3. y, it has a larger range

  4. Bell curve, it is symmetrical

  5. Right skewed because it has a long tail to the right

6

  1. 16

  2. 22

  3. y, it is more spread out

  4. yes, 30 is an outlier

  5. Y is left skewed, as it as a long left tail.

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. type answer (note data is in order) 42,50.5,4.5,57.5,69
boxplot(dat3)

  1. It is symmetric and has one outlier