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Alex Ar [27]
3 years ago
12

A set of data has a sample mean of 65.4 and a standard deviation of 1.2. If the sample size is 45. what is the 99% confidence in

terval of this data?
OA
64.94 and 65.86
ОВ.
65.05 and 65.75
Ос.
65.10 and 65.70
OD
65.33 and 65.47
Mathematics
1 answer:
bagirrra123 [75]3 years ago
6 0
67.55 is the correct answe bec I add
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I need help with this question can you help me
Debora [2.8K]

Answer:

28.26ft

Step-by-step explanation:

A=πr^2

π*3^2=28.27433

28.26

6 0
3 years ago
The question is in the picture, PLEASE HELPPP!
Mumz [18]

Answer:

1=c

Step-by-step explanation:

1=c

2=d

3=e

4=a

5=b

I know 1 and 2 are correct, but I am not sure about the others

I'm not too sure how to explain this, sorry

8 0
3 years ago
Which 3-D object is a polyhedron?<br> A. sphere<br> B. cube <br> C. cone
Levart [38]

Answer:

The answer is A.

Step-by-step explanation:

A polyhedron is a three-dimensional solid made up of polygons. It has flat faces, straight edges, and vertices. For example, a cube, prism, or pyramid are polyhedrons.

7 0
2 years ago
I need help with question 3 ? Not really sure how to go about it
Zepler [3.9K]
Place an imaginary dot at 0,0. after that go five lines to the right, then 3 lines down. That spot would be at 5,-3.
4 0
4 years ago
Find the value of x y and z below !
ehidna [41]

Answer:

x=67, y=121, z=65

Step-by-step explanation:

One property of parallelogram is that opposite angles have the same measure, so we can write down:

(y-9)=112\\y=121

Another property is that two adjacent angles are supplementary (meaning that they add up to 180 degrees). Thus, the following equations are true:

(z+3)+112=180\\(x+1)+112=180

Solve the equations:

(z+3)+112=180\\z+115=180\\z=65\\(x+1)+112=180\\x+113=180\\x=67

To check, add up all 4 angles and check if they sum up to 360 degrees:

x=67, y=121, z=65\\(y-9)+(x+1)+(z+3)+112=360\\(121-9)+(67+1)+(65+3)+112=360\\112+68+68+112=360\\360=360

And please ignore the fact that I cannot insert the degree sign :(

8 0
3 years ago
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