Question

construct a back-to-back stemplot showing life expectancy by gender. use ages in years and split stems.
nation male female
a 73.6 79.1
b 57.4 62.1
c 64.2 70.2
d 71.6 78.7
e 69.0 70.7
f 67.6 71.2
g 64.9 68.3
h 51.5 58.5

the data ranges from 51.5 to 78.7. how many stems will be in the split-stem stemplot?
____ stems

Explanation:

Step1: Identify stem range

Data spans 51.5 to 78.7. Stems are tens digits: 5, 6, 7.

Step2: Apply split stems rule

Split stems divide each stem into two: one for leaves 0-4, one for 5-9.

Step3: Count split stems

Original stems (5,6,7) × 2 = 6 stems.

Answer:

6 stems