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OlgaM077 [116]
2 years ago
9

Can someone please help me

Mathematics
1 answer:
Nastasia [14]2 years ago
5 0

Answer: I'm not to sure about this question its kind of confusing.

Step-by-step explanation:

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1,2,3
Darya [45]
1. scalene
2. rectangle or parallelogram
3. right triangle
8 0
3 years ago
Read 2 more answers
Construct a 99% confidthence interval for the population mean .Assume the population has a normal distribution. A group of 19 ra
Kobotan [32]
<h2>Answer with explanation:</h2>

Confidence interval for mean, when population standard deviation is unknown:

\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}

, where \overline{x} = sample mean

n= sample size

s= sample standard deviation

t_{\alpha/2} = Critical t-value for n-1 degrees of freedom

We assume the population has a normal distribution.

Given, n= 19 , s= 3.8 , \overline{x}=22.4

\alpha=1-0.99=0.01

A) Critical t value for \alpha/2=0.005 and degree of 18 freedom

t_{\alpha/2} = 2.8784

B) Required confidence interval:

22.4\pm ( 2.8744)\dfrac{3.8}{\sqrt{19}}\\\\=22.4\pm2.5058\\\\=(22.4-2.5058,\ 22.4+2.5058)=(19.8942,\ 24.9058)\approx(19.9,\ 24.9)

Lower bound = 19.9 years

Uppen bound = 24.9 years

C) Interpretation: We are 99% confident that the true population mean of lies in (19.9, 24.9) .

5 0
3 years ago
Jacob watered the flower garden. What is the verb of this simple sentence
matrenka [14]

Answer:

Watered

Step-by-step explanation:

Hope this helps

7 0
3 years ago
Read 2 more answers
At a pet store, there are 30 aquariums.
irakobra [83]

Answer:

f = (20 × 15) + (10 × 6)

Explanation:

You are just find how many fish are salt water and how many freshwater and adding them together. The total number of aquariums is irrelevant in this case.

8 0
3 years ago
Find the value of b. PLEASE HELP ASAPPPP!!!!<br> A. 56<br> B. 140<br> C. 230<br> D. 65
Finger [1]

Answer:

C

Step-by-step explanation:

b=360-2(65)=360-130=230

8 0
2 years ago
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