The data are from Charles Darwin’s study of cross- and self -fertilization. Pairs of seedlings of the same age, one produced by cross-fertilization and the other by self-fertilization, were grown together so that members of each pair were reared under nearly identical conditions. The aim was to demonstrate the greater vigor of the cross-fertilized plants. The data given in pairs are the heights ofeach plant (in inches) after a fixed period of time. Cross (X1)

23.5

12.0

21.0

22.0

19.1

21.5

22.1

20.4

18.3

21.6

23.3

Self (X2)

17.4

20.4

20.0

20.0

18.4

18.6

18.6

15.3

16.5

18.0

16.3

Using d = x1- x2, carry out the test using a 0.05 level of significance.

The conclusion is:

Group of answer choices

Cross-fertilized plants have the same vigor as the self-fertilized plants.

Cross-fertilized plants do not have greater vigor than self-fertilized plants

Cross-fertilized plants have greater vigor than self-fertilized plants

Cross-fertilized plants have lesser vigor than the self-fertilized plants

lolololkzaxio2ier286udeg

la parábola es el lugar

geométrico en el cual los puntos tienen una distancia idéntica, equidistantes,

de un punto denominado foco, f, y una recta denominada directriz

el radio vector de una

parábola es el segmento que existe entre un punto cualquiera y el foco.

por la ecuación se observa

que la parábola abre hacia la derecha, por lo cual podemos usar las siguientes fórmulas

la ecuación ordinaria de la

parábola es y^2 = 4px, donde p es la longitud desde el vértice de la parábola al

foco.

la fórmula de la directriz

es x + p = 0

resolviendo:

y^2-9x = 0

y^2 = 9x

4p = 9, entonces p = 9/4

entonces el foco tendrá la

coordenada f(9/4,0)

la directriz vendrá

expresada por

x + p = 0

x = -p

x = -9/4

el problema indica que la

ordenada es igual a 6, entonces

(6)^2=9x

x = 36/9

x = 4

entonces el punto al cual

hay que obtener la distancia será p(4,6)

calculando se tendrá: pf = 

pf = 6,25 u

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step-by-step explanation:

18.8cm hope i at all

step-by-step explanation:

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.