Amphetamine is a drug that suppresses appetite in most animals. To study the magnitude of this effect in rats a scientist randomly assigned thirty rats into three treatment groups to receive either a dose of amphetamine (2.5 or 5.0 mg/kg) or a control (saline, 0 mg/kg). Then food consumption was measured in grams per kilogram of body weight (g/kg) for the three-hour period after the injection. A) Which of the choices on Canvas best represents the null/alternative hypothesis of this study?

µ1 = µ2

µ1 ≠ µ2

µ1 > µ2

µ1 < µ2

µ1 ≥ µ2

µ1 ≤ µ2

θ1 = θ2

θ1 ≠ θ2

θ1 > θ2

θ1 < θ2

θ1 ≥ θ2

θ1 ≤ θ2

ρ = 0

ρ ≠ 0

β = 0

β ≠ 0

The residuals of these data are consistent with a normal distribution.

These residuals of these data are not consistent with a normal distribution.

The variances of the response/residuals are the same for all values of x.

The variances of the response/residuals are not the same for all values of x.

on a coordinate grid, point a is at (−4.0, −2.4) and point b is at (4.0, −2.4). point b is a reflection of point a across the –axis. input either a lowercase x or i think is the right awnser

step-by-step explanation:

c

-by-step explanation:

it would be c

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.