Answer:
option (b) 0.0228
Step-by-step explanation:
Data provided in the question:
Sample size, n = 100
Sample mean, μ = $20
Standard deviation, s = $5
Confidence interval = between $19 and $21
Now,
Confidence interval = μ ± 
thus,
Upper limit of the Confidence interval = μ +
or
$21 = $20 + 
or
z = 2
Now,
P(z = 2) = 0.02275 [From standard z vs p value table]
or
P(z = 2) ≈ 0.0228
Hence,
the correct answer is option (b) 0.0228
Part A:
Answer is C
Part B:
Answer is A
Answer:
no it is not
Step-by-step explanation:
8 × 1 does not equal 2
For this case, the first thing we are going to do is define the following variables:
x: Sister points.
y: George's points.
We write the following mathematical equation:
y = 2 * (x-4)
His sister has 16 points:
y = 2 * (16-4)
y = 2 * (12)
y = 24
Answer:
How many points does George have?
George has 24 points.
What operations are needed to solve this word, and in what order should they be used?
subtraction and multiplication, in that order
Hello :
<span>y = 2x – 4 ...(1)
y = (x – 1)² – 5....(2)
subsct in (2) :
2x - 4 = </span>(x – 1)² – 5
2x - 4 = x² -2x +1 -5
x² -4x =0
x(x-4) =0
x= 0 or x = 4
if : x = 0 y = 2(0) -4 = -4
if : x = 4 y = 2(4)-4 = 4
two solutions : (0, 4) , (4, 4 )
