Please help with #9 To further analyze the breakdown of her class, a contingency

Question

Please help with #9 To further analyze the breakdown of her class, a contingency table was created (even if it doesn't meet the requirement, complete a anyway) Tell me 3 things the data tells you. (I need percentages and really analyze data) make 2 conditional tables Using the Chi Square formula, is there an association at the.05 level of significance? (use all boxes) The teacher then decided to implement some interventions. A simple random sample of 12 students (assume normal distribution) were given math interventions. Prior to interventions, those students mean score was 540.67. After interventions, the mean difference was-4.5 with a standard deviation of 5.39. At the 01 level of significance, was the intervention successful?

Explanation / Answer

9) TS = (-4.5 / (5.39/sqrt(12)) = -2.8921

df = n-1 = 11

p-value = 2 * P( t < -2.8921) =0.0073*2 = 0.0146

since p-value > 0.01

we fail to reject the null hypothesis

if the hypothesis was one-sided then we would have rejected the null

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