In a test of the effectiveness of a device that is supposed to increase gasoline mileage in automobiles, 12 cars were run over a prescribed course both with and without the device. The mileages are given below. Conduct hypothesis test at ?=.05.
Car Without Device With Device
1 21 20.6
2 30 29.9
3 29.8 30.7
4 27.3 26.5
5 27.7 26.7
6 33.1 32.8
7 18.8 21.7
8 26.2 28.2
9 28 28.9
10 18.9 19.9
11 29.3 32.4
12 21 22

option 2 is correct.

step-by-step explanation:

we are given two inequality equation

x+y> 5 and -3x+2y< -2

first we draw the graph of both function using t-table method

equation: x+y> 5

for x=0, y=5

for x=-5, y=0

table:

x   :   0     5

y   :   5     0

test point (0,0) , 0> 5

false

equation: -3x+2y< -2

for x=0, y=-1

for x=2, y=4

table:

x   :   0     2

y   : -1       4

test point (0,0) , 0< -2

true

now we draw the graph. see the attachment for graph.

common region would be solution set.

option 2 is correct.

it is x=-4

step-by-step explanation:

true

step-by-step explanation:

it is more then likely a review to you prepare for an upcomign test or quiz

mariah is studying the life cycle of the monarch butterfly. she must choose one stage in the cycle to present in science class: egg, caterpillar, chrysalis, or adult. she plans to make her choice randomly using a custom spinner divided into four sections. first, however, she spins the spinner 50 times to see the frequencies it generates.

stage times landed on

egg 10

caterpillar 12

chrysalis 15

adult 13

step-by-step explanation: