Answer:
What times 7 divided by three gets you 52.5. That's what you need to ask yourself. The formula is B×H÷3.
Hope this helps
Step-by-step explanation:
Answer:
the answer is 4 it is 4 times combo meal 2
Coordinates are written (x,y). So find P on the graph. Start at the origin, (0,0), and go left 2 units, sp you're right under P. Since you went left, it's negative, x=-2. Then just go up until you get to P, y=3. So you end up with P is at (-2,3). Hope this helps!
If the three slashes are 190, 195, and 200, we can see it as
<span>-l----------l--------|--l- with the slightly longer line being around 198.78. Since it is clearly closer to the end of the line than the start of the line, we round it to 200</span>
Answer:
a) 0.1003
b) 35.26
c) 21.92
d) Middle 80% smallest 10% and largest 10% = 20.02 and 39.98
Step-by-step explanation:
Given that: mean ц = 30 , standard deviation δ = 7.8
a) P(x ≤ 20)
= P [ (x - ц ) / δ ≤ ( 20 -30) / 7.8 ]
= P(z ≤ -1.28)
= 0.1003
probability = 0.1003
b) 75th percentile
P(Z < z) = 0.75
z = 0.674
Using z-score formula
x = z * δ + ц
x = 0.674 * 7.8 + 30
x = 35.26
c) 15th percentile
P(Z < z) = 0.15
z = -1.036
Using z-score formula
x = z * δ + ц
x = (-1.036) * 7.8 + 30
x = 21.92
d) Middle 80%
P(-z ≤ Z ≤ z) = 0.80
P(Z ≤ z) - P(Z ≤ -z) = 0.80
2P(Z ≤ z) - 1 = 0.80
2P(Z ≤ z) = 1 + 0.80 = 1.80
P(Z ≤ z) = 1.80 / 2 = 0.90
P(Z ≤ ± 1.28) = 0.90
z = -1.28, + 1.28
x = z * δ + ц
x = (-1.28) * 7.8 + 30
x = 20.02
x = z * δ + ц
x = 1.28 * 7.8 + 30
x = 39.98
Middle 80% two values = 20.02 and 39.98
smallest 10%
P(Z < z) = 0.10
z = -1.28
Using z-score formula
x = z * δ + ц
x = ( -1.28) * 7.8 + 30
x = 20.02
largest 10%
P(Z > z ) = 0.10
1 - P(z < z) = 0.10
P(z < z) = 1 - 0.10 = 0.90
z = 1.28
Using z-score formula
x = z * δ + ц
x = (1.28) * 7.8 + 30
x = 39.98