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<E> Study the class intervals in the frequency table. Emma has not chosen the class Intervals
correctly. Suggest how Emma could correct the class intervals.
Class intervals Tally Frequency
0-10 -mt+m III 13
10-20 41
20^0 mm mm m m 30
40-50 mmm 15
50-60 1 1
Total 100
Mathematics Connect
7 Day Forecast O
Wed Thu Fri Sat Sun Men Tue
Stormy Windy Cloudy Partly Light rain Sunny Sunny
and humid cloudy
A
28°C 27°C 28°C 29°C 29°C 30°C 30°C
Weather is linked to our everyday activities. People often turn to weather
forecasts when preparing for a variety of activities. Nowadays, we can easily
access weather information and predictions from different sources for free.
By gauging and taking note of the weather, we see patterns taking place. These
patterns come and go, thus providing the foundation for predicting weather.
Meteorological agencies around the globe collect as much data as possible about
the present condition of the atmosphere. Real-time observations of air pressure,
temperature, wind speed and direction, cloud type, precipitation and so on are
collected. Meteorologists then feed the data input from atmospheric observations
into computer systems that make use of modelling techniques to interpret the
data and predict future weather.
170 UNIT 7 Data handling
1
