Answer:
X - 7 = - 3
X = - 3 + 7
X = 4
the 7 turns positive because it was moved to the other side of the symbol "=" so we reverse the sign
- becomes +
and
+ becomes -
Answer:
The range of z-score is given below as
![P(-1.21Using a graphing calculator, we will have the image be[tex]\begin{gathered} P(z](https://tex.z-dn.net/?f=P%28-1.21Using%20a%20graphing%20calculator%2C%20we%20will%20have%20the%20image%20be%3Cp%3E%3C%2Fp%3E%3Cp%3E%3C%2Fp%3E%5Btex%5D%5Cbegin%7Bgathered%7D%20P%28z%3C-1.21%29%3D0.11314%20%5C%5C%20P%28z%3C2.26%29%3D0.9881%20%5C%5C%20P%28-1.21%3Cstrong%3EHence%2C%3C%2Fstrong%3E%3Cp%3E%3Cstrong%3EThe%20final%20answer%20is%3C%2Fstrong%3E%3C%2Fp%3E%5Btex%5DP%28-1.21%5Clt%20z%5Clt2.26%29%3D0.8750)
Apperently someone deleted my question i was trying to see if you had understood what i was trying to help you on
Answer:
Step-by-step explanation:
Since the results for the standardized test are normally distributed, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = test reults
µ = mean score
σ = standard deviation
From the information given,
µ = 1700 points
σ = 75 points
We want to the probability that a student will score more than 1700 points. This is expressed as
P(x > 1700) = 1 - P(x ≤ 1700)
For x = 1700,
z = (1700 - 1700)/75 = 0/75 = 0
Looking at the normal distribution table, the probability corresponding to the z score is 0.5
P(x > 1700) = 1 - 0.5 = 0.5
