Question

please answer all of the questions for me!

Question 2 If sp2 is = 81, n = 9 and 522 = 27, n2 = 9, what is s(M1 - M2)? O a 12 O b. 4.73 O c. 6 3.46

Answer 1

Solution-:

Q.2 Given:

Estimated standard error,

  $s_{M_{1}-M_{2}}=\sqrt{\frac{s_{1}^2}{n_{1}}+\frac{s_{2}^2}{n_{2}}}=\sqrt{\frac{81}{9}+\frac{27}{9}}=\sqrt{\frac{81+27}{9}}=\sqrt{\frac{108}{9}}=\sqrt{12}=3.46$

Option (d) 3.46 is correct

Q.5 Given:  

n = 8, a = 0.05

$t_{(n-1),\alpha}=t_{(8-1),0.05}=t_{7,0.025}=2.365$ (Fom t-table)

Option (c) 2.365 is correct

Q.6 Given:

$S_{p}^2=\frac{df_{1}*SS_{1}+df_{2}*SS_{2}}{df_{1}+df_{2}}=\frac{25+36}{4+5}=\frac{61}{9}=6.78$

Option (a) 6.78 is correct