23 Determine if the study involves observational or experimental. Some gardeners prefer to use nonchemical methods to control insect pests in their gardens. Researchers have designed two kinds of traps, and want to know which design will be more effective. They randomly choose 10 locations in a large garden and place one of each kind of trap at each location. After a week, they count the number of bugs in each trap. Experimental Observational 24 Determine if the study involves observational or experimental. In 2002, the journal Science reported that a study of women in Finland indicated that having sons shortened the lifespan of mothers by about 34 weeks per son, but that daughters helped to lengthen the mothers' lives. The data came from church records from the period 1640 to 1870. Observational Experimental
23 Determine if the study involves observational or experimental. Some gardeners prefer to use nonchemical methods to control insect pests in their gardens. Researchers have designed two kinds of traps, and want to know which design will be more effective. They randomly choose 10 locations in a large garden and place one of each kind of trap at each location. After a week, they count the number of bugs in each trap. Experimental Observational 24 Determine if the study involves observational or experimental. In 2002, the journal Science reported that a study of women in Finland indicated that having sons shortened the lifespan of mothers by about 34 weeks per son, but that daughters helped to lengthen the mothers' lives. The data came from church records from the period 1640 to 1870. Observational Experimental
Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Transcribed Image Text:23
Determine if the study involves observational or experimental.
Some gardeners prefer to use nonchemical methods to control insect pests in their gardens.
Researchers have designed two kinds of traps, and want to know which design will be more
effective. They randomly choose 10 locations in a large garden and place one of each kind of
trap at each location. After a week, they count the number of bugs in each trap.
Experimental
Observational
24
Determine if the study involves observational or experimental.
In 2002, the journal Science reported that a study of women in Finland indicated that having
sons shortened the lifespan of mothers by about 34 weeks per son, but that daughters helped
to lengthen the mothers' lives. The data came from church records from the period 1640 to
1870.
Observational
Experimental
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