Two separate samples receive two different treatments. The first sample has n = 9 with SS = 710, and the second has n = 6 with SS = 460. Compute the pooled variance for the two samples.

The pooled variance for the two samples is 90

Step-by-step explanation:

Here in this question, we are interested in computing the pooled variance for the two given samples.

From the question;

n1 = 9

ss1 = 710

n2 = 6

ss2 = 460

The pooled variance can be calculated using a mathematical formula as shown below;

S^2 =( ss1 + ss2)/(n1 + n2 -2)

where S^2 refers to the pooled variance of both samples.

Plugging the values into the equation, we have ;

S^2 = (710 + 460)/9 + 6 -2 = 1170/13 = 90

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %