Theorem: If a random variable is normally distributed with a mean of µ and a standard deviation of σ, then the sample mean with a sample size of n would be normally distributed too with the same mean and a standard deviation of
.
In this case, µ = 1200, σ = 60, sample size n = 36.
So the sample mean has a mean of 1200 and a standard deviation of
.
Then the z-score that corresponds to 1224 is
Answer:
Variation equation: y = k/√x
constant of variation: 200
Variation Equation by plugging the value of k: y = 200/√x
Step-by-step explanation:
If y varies inversely with the SQUARE ROOT of x, then;
y = k/√x
If x = 4, y = 100.
100 = k/√4
100 = k/2
200 = k
k = 200
Substitute into the expression
y = k/√x
y = 200/√x
Answer:
7-y=-3(6-x)
Step-by-step explanation:
Point slope form:
Substitute y in for 7. Substitute x in for 6. Substitute m in for -3.
Answer:
50% of the beads were blue.
Step-by-step explanation:
15 is half of 30, therefore, 1/2 or 50% of the beads were blue.
Step-by-step explanation:
1.4 × 104
i.e (0.7 × 2) × 104
= 1.4 × 104 ≈ 145.6