Answered: the stratum (n.) stratum mean 6.49 Stra…

Math

Statistics

the stratum (n.) stratum mean 6.49 Stra 81 31 6.77 14 6.5 20 7.25 17 6.76

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

A survey was conducted in a municipality. It was decided to stratify the municipality into 5 geographical areas.
Within each stratum, a sample was chosen by simple random sampling.

look at the table (pic)

a. Estimate the population total
b. Estimate the variance of the estimate of the population total.

Total number of sampling
units in the stratum (N)
Sample taken from
the stratum (n)
Estimate of
Estimate of
Stratum
stratum mean
Stratum variance (S?)
448
81
6.49
6.65
P2
131
31
6.77
12.11
81
14
6.5
4.58
4
108
20
7.25
7.57
3
5
100
17
6.76
5.19
1

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