Answer:
x= , 5
Step-by-step explanation:
The roots (zeros) are the x-values where the graph intersects the x-axis. To find the roots (zeros), replace y with 0 and solve for x.
What is the correlation coefficient for the data shown
1 answer:
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Answer:
a) sample size ≥ 30
b) 0.0017
Step-by-step explanation:
a) The central limit theorem states that for population with mean μ and standard deviation σ and take sufficiently large random samples from the population. This will hold provided the sample size is sufficiently large (usually n > 30) for a normal population.
Therefore the sample size should be greater or equal to 30 i.e n ≥ 30.
b) Given that n = 45, μ = 11.4 minutes and σ = 3.2 minutes, the z score (z) is given by the equation:
Substituting values to get:
Using the z table:
P(x < 10) = P(z < -2.93) = 0.0017
the probability that a random sample of n=45 oil changes results in a sample mean time of less than 10 minutes is 0.0017
Answer:
16.5 m
Step-by-step explanation:
Hi there!
Set up a proportion (letting h = the height of the tree):
Multiply both sides by 22 to isolate <em>h</em>:
6/8 * 22 = h
h = 16.5
Therefore, the height of the tree is 16.5 m.
I hope this helps!