The Centers for Disease Control and other organizations are interested in the health benefits of breast-feeding for infants. The National Immunization Survey includes questions about breast-feeding practices, including: €œHow long was [your child] breast-fed or fed breast milk?€ The data for duration of breastfeeding, in months, for 20 hypothetical mothers are presented below.

a. Create a frequency table for these data. Include a third column for percentages. 

b. Create a histogram of these data. 

c. Create a frequency polygon of these data. 

d. Create a grouped frequency table for these data with three groups (create groupings around the midpoints of 2.5 months, 7.5 months, and 12.5 months). 

e. Create a histogram of the grouped data. 

f. Create a frequency polygon of the grouped data. 

g. Write a summary describing the distribution of these data with respect to shape and direction of any skew. 

h. If you wanted the data to be normally distributed around 12 months, how would the data have to shift to fit that goal? How could you use knowledge about the current distribution to target certain women?

Transcribed Image Text:

070 12 9 3 206 10 30 2 1 30 3 1 1 4