Mathematics, 22.05.2021 06:40 sgslayerkingminecraf

A music test was conducted among randomly selected 100 students in a school. 100 students were split into two groups of 50 students each. One group was asked to play
their best music while they smelt smoke from garbage. Another group was asked to
play their best music while they smelt flowers from a garden. The students were
tested individually from each group; result was recorded and compared.
What will happen if a few masters are placed in the treatment group?
A: The sample will not be a random sample and investigation may become invalid.
B: The sample will be a random sample and the investigation may be strong.
C: The sample will not be a random sample and it may lead to observation method.
D: The sample will not be random, but it may lead to survey method.

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A music test was conducted among randomly selected 100 students in a school. 100 students were spli...

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