Question

PLEASE help ??

A researcher conducted a single sample t-test on results of an experiment with n = 18 participants and the computed t = -2.28. What is the correct conclusion from this experiment if p < 0.05, 2-tails test is used for hypothesis testing? O A. The researcher failed to reject the null hypothesis and concluded that there is a significant treatment effect. O B. The researcher rejected the null hypothesis and concluded that there is a significant treatment effect. and concluded that there is no significant treatment effect. O D. The researcher rejected the null hypothesis and concluded that there is no significant treatment effect. Reset Selection

Answer 1

Saloban => whem P<0.05 the correct answer is: The researcher rejected the hull hypothee's there is a significant treatment effect. so optam (B) is the correct answer. and concluded that I =) when peo05 that there is a -) Reject noull hypothesis. and conclude Significant difference. so, optiom CC) is the coxdect answer => Griver mean difference 210 Standard erw z4, t-test = 10 - 2.5 - so, the correct opsiom is (A), 2,5 =) Given n, 25, n2=10 and so = 30 Here we have to find standard extor. standard error =

so, correct answer is opticm (D) 3.