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tensa zangetsu [6.8K]
3 years ago
9

help pleasee. Find the perimeter of a quadrilateral with vertices at C (2, 1), D (2, 4), E (5, 1), and F (5, 4). Round your answ

er to the nearest hundredth when necessary.   A.12 units B.16 units C.20 units D.24 units
Mathematics
1 answer:
vredina [299]3 years ago
8 0
Distance from point C to point D: same x coordinate, 4-1=3; 3 units
Distance form point D to F: same y coordinate, 5-2=3
Perimeter is the measure of all sides
3+3+3+3=12
Solution: A. 12 units
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How do you solve this question?
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Your friend is 1.2 times taller than you. Your friend is 64.5 inches tall. How tall are you?
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3 years ago
What is the circumstance of the trampoline including its outer edge? Use 3.14 for pie
Lubov Fominskaja [6]

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c = 43.96

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7 0
3 years ago
1) If the alpha level is changed from α = .05 to α = .01, what happens to boundaries for the critical region?
Alexxandr [17]

Answer:

1) a. Move farther into the tails

2) a. Decreases

Step-by-step explanation:

Hello!

1)

Let's say for example that you are making a confidence interval for the mean, using the Z-distribution:

X[bar] ± Z_{1-\alpha /2} * \frac{Sigma}{\sqrt{n} }

Leaving all other terms constant, this are the Z-values for three different confidence levels:

90% Z_{0.95}= 1.648

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99% Z_{0.995}= 2.586

Semiamplitude of the interval is

d= Z_{1-\alpha /2} * \frac{Sigma}{\sqrt{n} }

Then if you increase the confidence level, the value of Z increases and so does the semiamplitude and amplitude of the interval:

↑d= ↑Z_{1-\alpha /2} * \frac{Sigma}{\sqrt{n} }

They have a direct relationship.

So if you change α: 0.05 to α: 0.01, then the confidence level 1-α increases from 0.95 to 0.99, and the boundaries move farther into the tails.

2)

The significance level of a hypothesis test is the probability of committing a Type I error.

If you decrease the level from 5% to 1%, then logically, the probability decreases.

I hope this helps!

5 0
3 years ago
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