Answer:
0.74 to 6.06
Step-by-step explanation:
The groups are independnet,
SE(xh bar-xa bar)=sqrt [sh^2/nh+sa^2/na]=sqrt [10.1^2/80+10.3^2/80]=1.61
At df=157, the t critical is 1.65
90%c.i=(xh bar-xa bar)+-tcritical SE(xh bar-xa bar)
=(25.2-21.8)+-1.65*1.61
=0.74 to 6.06
11 is the coefficient of r and 7 is the coefficient of s
72*24=1728
1728+16=1744
now u have to deal with the 30 minutes. since its less than an hour, half actually itl be .5
1744.5
Answer:
I believe it is true
Step-by-step explanation: