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Arisa [49]
3 years ago
15

Classify each sample as random, systematic, stratified, or cluster

Mathematics
1 answer:
morpeh [17]3 years ago
8 0

Answer:

(1) Cluster sample

(2) Systematic sample

(3) Random sample

(4) Systematic sample

(5) Stratified sample

Step-by-step explanation:

A simple random sample is a part of a statistical population in which every individual of the population has an equal probability of being selected.

Assigning each individual of the population a unique number and using a computer or random number generator for selection is a procedure to select a simple random sample.

Stratified sampling is a kind of sampling in which whole-population is distributed into homogeneous subgroups before one takes a sample. These subgroups are called strata which is mutually exclusive or related.

In this process the population members cannot be excluded.

Cluster Sampling is a method to randomly select samples from a population that is too enormous for simple random sampling.  

Using cluster sampling, the experimenter distributes the entire-population into distinct groups, called clusters. Then, a simple random sample of clusters is chosen from the population. Then the experimenter performs the analysis on data from the sampled clusters.

Systematic sampling is a kind of probability sampling method in which individuals from a larger population are nominated according to a random initial point and a static, periodic interval.

Consider all the definitions of different types of samples.

(1) Cluster sample

(2) Systematic sample

(3) Random sample

(4) Systematic sample

(5) Stratified sample

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Which table shows ordered pairs that satisfy the function y=x2+1
weeeeeb [17]
I think you meant  y = x^2 + 1.  Please use " ^ " to denote exponentiation.

Since you haven't shared the table, I'll choose a few x values and find the corresponding y-values:

x   y
--  --
0   1
1   2
2   5
10 101

3 0
3 years ago
Read 2 more answers
The prism shown has a volume of 35 cm.
Vesna [10]

Answer:

1.25cm

Step-by-step explanation:

<em>Complete question:</em>

The prism has a volume of 35 cm cubed  workout h, the height of the triangular cross section

<em>length=7cm</em>

<em>width = 4cm</em>

<em></em>

The volume of the prism is expressed as;

Volume = Base Area * Height

Given

Volume of the prism = 35cm^3

Base Area = length * width

Base Area =  7cm * 4cm

Base Area = 28cm^2

Substitute the given values into the formula

35 = 28* Height

Cross multiply

35 = 28 * Height

35 = 28 Height

Height = 35/28

Height = 1.25cm

Hence the height of the triangular cross section is 1.25cm

7 0
3 years ago
Solve for a <br> show your work -2(a-3)=12
bekas [8.4K]

Answer:

a = -3

Step-by-step explanation:

-2(a-3)=12

distribute the -2 to the terms in the paranthesis

-2a + 6 = 12

minus 6 both sides

-2a = 6

divide -2 both sides to isolate a

a = -3

I hope this was helpful (:

5 0
4 years ago
Read 2 more answers
I don't get it<br><br> It like like realllllllly hard
luda_lava [24]
Find the difference between x and y, so 3 and 27, the difference is 9. To see if its constant, put it into 9*8, which is 72, so the constant is 9. To find the answer in the blanks, plug in 9 and the number to find the answer.<span />
6 0
3 years ago
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The number of users of a certain website (in millions) from 2004 through 2011 follows:
leonid [27]

Answer:

y = 26.3x² - 116.9x + 109.6

Step-by-step explanation:

Given the data ;

Year Period Users (Millions)

2004 1 1

2005 2 5

2006 3 11

2007 4 58

2008 5 145

2009 6 359

2010 7 607

2011 8 846

A quadratic regression model can be obtained using a quadratic regression calculator ; The quadratic regression modeled obtained is in the form :

y = Ax² + Bx + C

y = 26.3x² - 116.9x + 109.6

3 0
3 years ago
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