A study was conducted to assess the effects of overcrowding on learning among elementary school children. A random sample of 50 children was taught a given skill in overcrowded conditions and another of 45 children was taught the same skill under crowded conditions. the same teachers but without overcrowding at the end of the experiment each child was given a test to determine their level of mastery of the skill, the following results were obtained: sample variance conditions overcrowding not overcrowding sample mean 70 80 100 90 Will these data provide sufficient evidence to conclude that teaching is more effective under crowded conditions? α = 0.05.

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