For one set of 1000 variables x1, we have a t-stats t1, now we duplicate the variable two times to get 3000 variables: x1, x1, x1, x2, x2, x2, x1000, x1000, x1000 and we have a t-stats t2. what's the relationship between t1 and t2?

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

At 6 1/2 cents per pound of string beans how much does 7 pounds cost