Distribution of Daily Carbohydrate Intake - Assignment Example

College: Biostatistics Question i. There are 168 s included in the study ii. Types of variables a) Quantitative(measured as a number for which arithmetic operation make sense) Age Weight Height Juice Milk Energy Protein Carbohyd Fat intake b) Categorical(variables with no numerical meaning) Gender c) Ordinal(categorical variables for which levels can be naturally ordered) Fat_intake b) i) Checking the distribution of the variables age, height, juice, energy, carbohydrate and fat_intake Table 1: A table showing the summary statistics of Age mean sd min max 3.628 1.511 1.74 5.95 From Table 1, the mean age of infants is 3.6 years. The lower quintile and upper quintile were found to be; Q1:Q3 is 2.175:5.065 Figure 1: A graph showing the distribution of height From the graph, the distribution of height has two modes. This separation can be explained by the fact that there were child aged 2 and 5 years and each group has different range of heights. Figure 2: Distribution of ounces of juice taken per day From figure 2, the distribution of ounces of juice taken per day is right skewed. Most infants took between 0 and 10 ounces of juice per day. Figure 3: Distribution of daily Energy intake From figure 3, the daily energy intake for most infants was between 1000 and 2000. There were 2 infants with negative energy intake though the reason for the negative value is not known. Figure 4: Distribution of daily Carbohydrate intake The distribution of carbohydrate intake is slightly right skewed with thicker tail to the left. b) ii) Under variable gender observation with ID 168 had value 99. This means the gender of this infant was not recorded. In this analysis it will be treated as a missing observation. C. Command used to create variable age2_5 i. gen age2_5=0 if age Read More