In an interesting experiment, researchers examined the effect of ultrasound on birth weight. Pregnant women participating in the study were randomly assigned to one of
two groups. The first group of women received an ultrasound; the second group did not.
When the subjects’ babies were born, their birth weights were recorded. The women
who received the ultrasounds had heavier babies.

Solution
Comparison:
Random assignment:
Control:
Replication:

Is this a blind experiment? Why or why not?

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

16

step-by-step explanation:

answer: (yeees, you need a poet.)

//blooming serenity//

beautiful in the morning

mysterious at night

wonderous nature souring

with all it's mystical might

the flower that blooms

to the fox that looms

nocturnal creatures

with various features

a blooming flower soon in sight

as a new little hatchling fears to take flight  

afraid to leave it's calming nest,

but dear little bird, mother knows best

as sure as there are stars in the sky,

life is not about who, where what, when or why-

it's the journey that follows

adventures we swallow

of   nature's deep wonders,

natural disasters and storm's thunders.

blooming serenity

life and nature, truly is heavenly.

-kerstien lehman

step-by-step explanation: