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Hitman42 [59]
2 years ago
11

News cameras take an overhead picture of a part of a crowd at an outdoor event. journalists then count the number of people in t

he picture and use the sample to estimate the total number of people in the crowd. this process is an example of random sampling. stratified sampling. systematic random sampling. cluster sampling.
Mathematics
1 answer:
Law Incorporation [45]2 years ago
7 0

The given process is an example of a cluster system.

<h3>What is the cluster system?</h3>

The clustered systems are a combination of hardware clusters and software clusters.

The hardware clusters help in sharing of high-performance disks between the systems.

The software clusters makes all the systems work together.

Each node in the clustered systems contains the cluster software.

A cluster refers to a group of inter-connected computers where it works together to support applications and middleware (e.g. databases).

In a cluster, each & every computer is known to be a “node”.


To know more about the cluster system click the link given below.

brainly.com/question/4804019

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notsponge [240]

Answer: 0.1457

Step-by-step explanation:

Let p be the population proportion.

Given: The proportion of Americans who are afraid to fly is 0.10.

i.e. p= 0.10

Sample size : n= 1100

Sample proportion of Americans who are afraid to fly =\hat{p}=\dfrac{121}{1100}=0.11

We assume that the population is normally distributed

Now, the probability that the sample proportion is more than 0.11:

P(\hat{p}>0.11)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}>\dfrac{0.11-0.10}{\sqrt{\dfrac{0.10(0.90)}{1100}}})\\\\=P(z>\dfrac{0.01}{0.0090453})\ \ \ [\because z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}} ]\\\\=P(z>1.1055)\\\\=1-P(z\leq1.055)\\\\=1-0.8543=0.1457\ \ \ [\text{using z-table}]

Hence, the probability that the sample proportion is more than 0.11 = 0.1457

3 0
3 years ago
I need help with question in photo
Rufina [12.5K]

Answer:

14

Step-by-step explanation:

{x}^{2}  =  {4}^{2}  \\  = 16\\ 4y = 4 \times  - 3 \\ 4 \times  - 3 =  - 12 \\  16 -  - 12 =16 + 12  \\  -  \times  -  =  +  \\ 16 + 12 = 28 \\ 28 \div 2 = 14

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2 years ago
Joseph has 2 2/3 bags of popcorn, Sally has 1 3/4 bags of popcorn. How much do they have together?
Aliun [14]

Answer:

4 5/12 or four and five twelfths or 4 and 5 over 12

Step-by-step explanation:

7 0
3 years ago
I need help with this math question 7+(3•5)
Ainat [17]

Answer:

The answer is 22

Step-by-step explanation:

(3 • 5) = 15

7 + 15 = 22

22 is your answer

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Hatshy [7]
There are 7,920 minutes in 5.5 days

60minutes in an hour
24hours in a day

60 times 24 times 5.5 = 7,920
7 0
3 years ago
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