A statistics wants to assess whether her remedial has been effective for her fiv

Question

A statistics wants to assess whether her remedial has been effective for her five students. She decides to conduct a related samples t-test and records the following grades for students prior to and after receiving her.

(a) Test whether or not her is effective at a 0.05 level of significance. State the value of the test statistic. (Round your answer to three decimal places.)
t =   

(b) Compute effect size using estimated Cohen's d. (Round your answer to two decimal places.)
d =

Before After 2.5 3.1 2.6 3.0 3.1 3.6 3.0 3.3 2.8 3.6

Explanation / Answer

here

from abvoe test stat t=6.0449

tthe test is effective as test stat is in critical region

b) COhen 's d = d/std deviation =0.52/0.1924=2.702

before after difference(d) 2.5 3.1 0.6 2.6 3 0.4 3.1 3.6 0.5 3 3.3 0.3 2.8 3.6 0.8 mean 0.52 std deviaition 0.1924 std error= std dev/(n)^(1/2) 0.0860 t stat= (d-0)/std error 6.0449

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