Suppose iq scores were obtained for 20 randomly selected sets of twins. the 20 pairs of measurements yield x overbarequals99.23, y overbarequals98.1, requals0.917, p-valueequals0.000, and modifyingabove y with caret equals negative 1.76 plus 1.01 x, where x represents the iq score of the twin born first. find the best predicted value of modifyingabove y with caret given that the twin born first has an iq of 103? use a significance level of 0.05.

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

y=sec x is the correct answer

~batmans wife dun dun

after going and makeing graphs i would go with a,

there is nothing that is matches the graph. if there was i would show you. but therefore my answer is a.

hope i

-lavira: )