Answer:
A
Step-by-step explanation:
|-12| = 12
distance from 0 to -12 is 12
and 12 = 12
A<b<c
b is the square root of 20
if we square everybody
a²<b²<c²
if we say that b²=20 then
a²<20<c²
find a and c
2^2=4
3^2=9
4^2=16
5^2=25
16<20<25
sqrt both sides
4<√20<5
somewhere between 4 and 5
closer to 16 than 25
A
Answer:
x axis =2.5 y axis 5
Step-by-step explanation:
you can also use a site called desmos to graph it for u
Answer:
Yes, there is evidence that there exists a difference in the true mean breaking strengths for the two types of welds. This is because confidence interval does not contain 0
Step-by-step explanation:
Given that in an inertia welding experiment, a sample of 50 welds made with a standard welding method were tested.
Group Group One Group Two
Mean 94.000 96.000
SD 3.000 3.500
SEM 0.424 0.452
N 50 60
The mean of Group One minus Group Two equals -2.000
standard error of difference = 0.629
t = 3.1818
df = 108
a) 95% confidence interval of this difference: From -3.246 to -0.754
b) Yes, there is evidence that there exists a difference in the true mean breaking strengths for the two types of welds. This is because confidence interval does not contain 0