Question

9.2-9.3

question 4

9.2-9.3

question 4 part 2

A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.10 significance level for both parts.

A study was done on proctored and nonproctored tests. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.05 significance level for both parts,

Answer 1

ucky Page No. Date: placebo Answers 1 Gluen Treatment Mi n 34 2+36 062 ولد 2 40 2.69 0.89 s usin 0.1 los a) Test the claim that two samples are from population with same mean Hypothesis Ho: Milla Hii MiFlz. Test statistics : since it is assumed that the population sd are unequal the t-statist is t= Xixz 2:36 -2.69 +52² 0.602 (089)2 34 40 Az t -1.871 P-value is p=0.0656 The test statistic is It -1.87 p-value is 0.066 Here P value 20.061 < =011 we Eesect Ho at 1% los. le we conclude that two fopu samples are from population with different mean.