Posted by **Mia** on Tuesday, February 21, 2012 at 5:57pm.

Ed wants to determine if there is a trend in air temperature changes during April. Which of the following procedures should he follow?

a) Measure the temperature every hour for 1 day; b) Measure the temperature at noon every day in April; c) Measure the temperature at the same time each Monday; d) Measure the temperature on the first and last day of April.

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