Hw4_skeleton

3.4

• 1. Z-score
• 2. Kth percentile
• 3. Quartiles
• 4. Interquartile range
• 5. 34 week bb=(24000-26000)/660=-0.30 40 week bb=(3300-35000)/470=-0.43
• 6. 34 week bb=(3000-2600)/660 = 0.61 40 week bb=(3900-3500)/470 = 0.85 The 40-week baby weights less relative to the gestation.
• 7. 75in man=(75-69.6)/3 = 1.8 70in woman=(70-64.1)/3.8 = 1.55 The 75-inch man is taller.
• 8. 67in man= (67-69.6)/3= -0.87 62in woman=(62-64.1)/3.8 = -0.55 The 67-inch man is taller.

1. 5th percent of males 36 months of age are less than or equal to 12 kg, so 95% of males 36 months of age are heavier than 12 kg.

2. 95th percent of newborn female are less than or equal to 53.8 cm, so nly 5% of newborn female are teller than 53.8 cm

1. 25% of U.S. crime rate is less or equal to 252.4. 50% of U.S. has crime rate between 252.4% and 333.8%. 25% of U.S. has crime rate more than 454.5%.

2. The interquartile range is (454.5-252.4)= 202.1

3. lower fence = 252.4-202.1 = 50.3 upper fence = 454.5-202.1 = 252.4 Yes, the crime rate in DC (1243.7) would be an outlier.

4. The ditribution is skewed to the right because of the outlier.

3.5

• 1. minimum, Q1, median, Q3, maximum
• 2. right

1. skewed right

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

1. Symmetric

2. Minimum:-1 Q1:2 M:5 Q3:8 Maxmum:11

1. 40

2. 52

3. Variable y has a larger standard deviation so it has more of a dispersion

4. Symmetric because the median is in the center, and the whiskers are the same length

5. skewed right because the right whisker is longer than the left, and the median is more to the left

1. 16

2. 22

3. variable y has larger standard deviation, so it has more dispersion

4. yes, 29

5. skewed left because the left whisker is longer and the median in more on the right of the center of the box

data <- c(.608,.608,.608,.610,.612,
          .601,.610,.608,.607,.598,
          .606,.610,.605,.611,.600,
          .602,.607,.609,.608,.605,
          .611,.600,.605,.610,.603)

boxplot(data,horizontal = T)

2. skewed left