A stem and leaf plot asks what is the average of high temperatures recorded?

Question

Stem         Leaf

0                 7 7

1                 8 9 4 8 7

2                 2 5 6 1 6

3                 9 5

4                  6 4 6 6

5                  1 6

Answer 1

STEM AND LEAF PLOT (DEGREES C)

STEM		L	E	A	F
0	7	7
1	4	7	8	8	9
2	1	2	5	6	6
3	5	9
4	4	6	6	6
5	1	6

Sum for each stem:

0: 14 14 (2)

1: 36 + 5*10=86 (5)

2: 20 + 5*20=120 (5)

3: 14 + 2*30=74 (2)

4: 22 + 4*40=182 (4)

5: 7 + 2*50=107(2)

TOTAL: 583 (20)

TRUE AVERAGE: 583/20=29.15

MEDIAN (middle value): 25.5 (average of 10th and 11th datum, average from plot).

The high temperature region where the temperature peaks at 46C is stem 3, 4, 5 and the average (median) is 46.

There are 8 values for stems 3-5. True average is (74+182+107)/8=363/8=45.375, close to the median 46.