Answer:
We conclude that the mean strength is equal to 3400 psi.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 3400 psi
Sample mean, = 3450 psi
Sample size, n = 12
Alpha, α = 0.051
Population standard deviation, σ =75 psi
First, we design the null and the alternate hypothesis
We use one-tailed(right) z test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
We fail to reject the null hypothesis and accept the null hypothesis. Thus, we conclude that the mean strength is equal to 3400 psi.
Answer:
Perpendicular
Step-by-step explanation:
Perpendicular lines have negative reciprocal slopes
-2/3 negated is
2/3
The reciprocal (flip the numerator and denominator) of 2/3 is
3/2
So, the lines are perpendicular
Hope this helps! :)
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Answer:
10
Step-by-step explanation:
10/4 = 2.5(fraction)
12/4 = 3
8/4 = 2
24/4 = 6
Answer:
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