3 years ago

Explain your answer fully

Mathematics

1 answer:

soldier1979 [14.2K]3 years ago

3 0

B. because if you draw another line the parts will be equal.

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What is the mode of this data set? {8, 11, 20, 10, 2, 17, 15, 5, 16, 15, 25, 6}

lidiya [134]

The mode is what appears the most so 15 is the answer because it appears the most.

8 0

3 years ago

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Solve for v <br> 4v=72<br> Simplify your answer as much as possible.

Ludmilka [50]

Answer:
v = 18

Explain:
Equation; 4v = 72

Begin by dividing both sides
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3 years ago

The compressive strength of concrete is being tested by a civil engineer who tests 12 specimens and finds that the sample mean i

ki77a [65]

Answer:

The 95% confidence interval for mean compressive strength is:

$3237.3\leq \mu\leq 3282.5$

Step-by-step explanation:

We have a sample of n=12 specimens, with sample mean=3259.9 and sample standard deviation = 35.57.

We know the population is normally distributed.

For a 95% confidence interval and df=n-1=11, the t-statistic is t=2.201.

Then, the CI can be expressed as:

$M-t*s/\sqrt{N}\leq \mu\leq M+t*s/\sqrt{N}\\\\3259.9-2.201*35.57/\sqrt{12}\leq \mu\leq 3259.9+2.201*35.57/\sqrt{12}\\\\ 3259.9-22.6\leq \mu\leq 3259.9+22.6\\\\3237.3\leq \mu\leq 3282.5$