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Deffense [45]
3 years ago
7

A wildlife management organization is interested in estimating the number of moose in a particular region. Organization employee

s divide the region into 10 sections and randomly select four sections to survey the number of moose present. What sampling method is being used
Mathematics
1 answer:
dusya [7]3 years ago
4 0

Answer:

<u>Cluster sampling method</u> is being used.

Step-by-step explanation:

Given:

A wildlife management organization is interested in estimating the number of moose in a particular region. Organization employees divide the region into 10 sections and randomly select four sections to survey the number of moose present.

Now, to find the sampling method that is being used.

The sampling method that is being used is cluster sampling method.

<u><em>The cluster sampling method is a sampling method in which the whole population is divided into groups and a sample of the groups is selected. Researchers in cluster sampling method divides the complete population in separate groups called clusters and they select a sample of clusters through simple random selection, to analyse on data of selected sampled clusters.</em></u>

<u><em>Here organization employees divide the region into 10 sections and randomly select four sections to survey the number of moose present. </em></u>

<u><em>On cluster sampling method researcher do analysis on data by estimating a parameter on population, computing sample variance and standard error within each cluster and computing its margin of error.</em></u>

Therefore, cluster sampling method is being used.

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Feliz [49]

Answer:

a) σ  =  4933,64

b) CI 99%  = ( - 5746  ;  7194 )

c) No difference in brands

Step-by-step explanation:

Brand 1:

n₁   =  8

x₁   = 38222

s₁   = 4974

Brand 2:

n₂  = 8

x₂  = 37498

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As n₁  =  n₂  = 8       Small sample  we work with t -student table

degree of freedom      df  = n₁  +  n₂  - 2    df = 8 +8 -2  df = 14

CI = 99 %   CI  =  0,99

From  t-student table we find   t(c)  = 2,624

CI  =   (  x₁  -  x₂ ) ±  t(c) * √σ²/n₁   +  σ²/n₂

σ² = [( n₁  -  1 ) *s₁² +  ( n₂  -  1  ) * s₂² ] / n₁ +n₂ -2

σ² = 7* (4974)² + 7*( 4893)² / 14

σ² = 24340783       σ  =  4933,64

√ σ²/n₁  +  σ²/n₂     =  √ 24340783/8   +  24340783/8

√ σ²/n₁  +  σ²/n₂     =  2466

CI 99%  =  (  x₁  -  x₂ ) ± 2,624* 2466

CI 99%  =   724  ± 6470

CI 99%  = ( - 5746  ;  7194 )

As we can see CI 99% contains 0 and that means that there is not statistical difference between mean life of the two groups

3 0
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Answer:

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What is the surface area of a cube in which each face of the cube has an area of 7 cm^2?
prisoha [69]

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Step-by-step explanation:

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Answer:

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Anthony rode more miles per week by ...

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Anthony rode 14 more miles per week than Malique.

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