were observ 6.5, 9.3, 4.4, 4.0, 3.8, 4.0. Find the interquartile range. 15. For the following annual rainfall data, find the grouped mean and the grouped variance. Rainfall < 20" 20-29.9" 30-39.9" 40-49.9" 50-59.9" ≥60" Number of years observed SONFM N 5 10 12 11 3 2 16U8 on J mun 000 Notice that assumptions must be made about the 'midpoints' of the open-ended age groups. In this example, use 15" and 65" as the midpoints of the first and last rainfall groups, respectively.

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I don't know how to solve Q15. I need al the process. 

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were observ
6.5, 9.3, 4.4, 4.0, 3.8, 4.0. Find the
interquartile range.
15. For the following annual rainfall data, find the grouped mean and the grouped
variance.
Rainfall
< 20"
20-29.9"
30-39.9"
40-49.9"
50-59.9"
≥60"
Number of years observed
SONFM N
5
10
12
11
3
2
16U8 on J
mun
000
Notice that assumptions must be made about the 'midpoints' of the open-ended age
groups. In this example, use 15" and 65" as the midpoints of the first and last rainfall
groups, respectively.
Transcribed Image Text:were observ 6.5, 9.3, 4.4, 4.0, 3.8, 4.0. Find the interquartile range. 15. For the following annual rainfall data, find the grouped mean and the grouped variance. Rainfall < 20" 20-29.9" 30-39.9" 40-49.9" 50-59.9" ≥60" Number of years observed SONFM N 5 10 12 11 3 2 16U8 on J mun 000 Notice that assumptions must be made about the 'midpoints' of the open-ended age groups. In this example, use 15" and 65" as the midpoints of the first and last rainfall groups, respectively.
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