Answer:
(3.442 ; 6.558)
Step-by-step explanation:
Given :
Mean score after patient is given the magnet treatment :
Mean score, xbar = 5
Standard deviation, s = 2.4
Sample size, n = 20
The confidence interval :
Mean ± margin of error
Margin of Error = Tcritical * standard error
The critical value at 95%, df = 20 - 1 = 19
Tcritical = 2.093 (T-student distribution)
The standard error = s/√n = 2.4 / √20 = 0.5367
The margin of error = 2.903 * 0.5367 = 1.558
The confidence interval :
Xbar ± Margin of error
5 ± 1.558
(3.442 ; 6.558)
How many tens are in 212?
Lets break it up.
200 has 20 tens
and 12 has 1 ten.
20 + 1 = 21
Answer: 21 tens.
Answer:
a = 54
Step-by-step explanation:
In geometry, the angles in a triangle add up to 180.
The unmarked angle at the top of the triangle = 180 - (a+10+44)
Or you could say that same angle = 180 - 2a because it is supplementary to the exterior angle... so
2a = a + 10 + 44
2a-a = 54
a = 54
F(x)=8x, because if you divide the money per hour you get the rate which is $8