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The table below shows Rainfall and Temperature figures of a station in North America.

 Month  J  F  M  A  M  J  J  A  S  O  N  D 
 Rainfall in mm 15  8 8 13  31  51  51  51  28  25  18  20 
 Temp (°C) −22  −19  −12  −1  4 10 11 11  5 −11  −18  −20
  1. Calculate the mean of temperature for the station. Show your working. 
  2. State five characteristics of the climate experienced in the station. 
  3. You intend to carry out a field study on vegetation around the station with the above climate.
    1. State 3 methods you would use to collect the data.
    2. Highlight 3 methods you are likely to use to record the data. 
    3. State 3 problems you are likely to face during the field study.

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  1. Mean of the temperature
    Add then divide by 12
    −22+−19+−12+−1+4+10+11+11+5+−11+−18+−20=
     −62  = −5.167  =−5
          12
  2. Characteristics of climate in the station
    1. Minimal range of temp. is very large.
    2. The coldest month is January.
    3. Highest rainfall occurs when temperature is high.
    4. The total annual rainfall is low 319 mm.
    5. The months of March and February records the lowest rainfall.
    6. Hottest month is July and August.
    7. Region experience rainfall through the year.
  3.  
    1. Methods used to collect the data
      • Observation
      • Interviewing
      • Administering questionnaires
      • Content analysis
      • Measuring
      • Photographing
    2. Methods used to record the data 
      • note taking -filling in questionnaires
      • tallying - drawing
      • tabulation - tape recording 
    3. Problems experienced during the study.
      • Lack of cooperation from potential respondents.
      • Poor weather conditions.
      • Incorrect information from the respondents.
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