Estimation of parameters n- (Za, ()(2.575x(2.5)= (6.44)2n = 41.47%Dn-42Therefore, you need to select 42 textbooks as samples from thebookstore to be 99% confident that the sample mean is within 2years of the true population mean.LET'S PRACTICEIdentify the number of samples needed in each problem.1. Given: d= 12CI= 93%O= 55n=?2. Given: d 153. It was reported that students who do online business during thispandemic crisis earns money with a standard deviation of P1,500. Ifyou wanted to estimate with 96% confidence the mean income ofstudents within P450 of the true population mean, how manystudents should you select?CI= 99.5%O= 70n=?Solution1. Given: d= 12Cl= 93%o= 55n=?2n= Za,%3D3 (8.3)²%3DPage | 44 CHAPTER 4= 68.89 = 69Therefore, 69 samples are needed in order to achieve a93% confidence level.Therefore,96% confidethe true po2. Given: d= 15Cl= 99.5%0= 70n=?2n =LE(Zo.005/,* ()Identify the= (2.81x(4.67))= (13.11)21. 1.2. 2.3. As= 171.87 = 172 samplesstTherefore, 172 samples are needed in order to achieve a99.5% confidence level.sf3. It was reported that students who do online business during thispandemic crisis earns money with a standard deviation of P2,000.If you wanted to estimate with 96% confidence the mean incomeof students within P450 of the true population mean, how manystudents should you select?RefererGiven: d= 450 C= 96%o= 2,000n=?BanigcSchoon =De GPublis(2000%3D450Seba= (2.05x(4.44)= (9.1)2Senic= 82.81Cerv= 83 samplesDeli

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Math

Statistics

Identify the number of samples needed in each problem. 1. Given: d= 12 Cl= 93% O= 55 n=?

College Algebra

1st Edition

ISBN:9781938168383

Author:Jay Abramson

Publisher:Jay Abramson

Chapter6: Exponential And Logarithmic Functions

Section6.8: Fitting Exponential Models To Data

Problem 3TI: Table 6 shows the population, in thousands, of harbor seals in the Wadden Sea over the years 1997 to...

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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

Estimation of parameters

n- (Za, ()
(2.575x(2.5)
= (6.44)2
n = 41.47
%D
n-42
Therefore, you need to select 42 textbooks as samples from the
bookstore to be 99% confident that the sample mean is within 2
years of the true population mean.
LET'S PRACTICE
Identify the number of samples needed in each problem.
1. Given: d= 12
CI= 93%
O= 55
n=?
2. Given: d 15
3. It was reported that students who do online business during this
pandemic crisis earns money with a standard deviation of P1,500. If
you wanted to estimate with 96% confidence the mean income of
students within P450 of the true population mean, how many
students should you select?
CI= 99.5%
O= 70
n=?
Solution
1. Given: d= 12
Cl= 93%o= 55
n=?
2
n= Za,
%3D
3 (8.3)²
%3D
Page | 44

CHAPTER 4
= 68.89 = 69
Therefore, 69 samples are needed in order to achieve a
93% confidence level.
Therefore,
96% confide
the true po
2. Given: d= 15
Cl= 99.5%
0= 70
n=?
2
n =
LE
(Zo.005/,* ()
Identify the
= (2.81x(4.67))
= (13.11)2
1. 1.
2. 2.
3. As
= 171.87 = 172 samples
st
Therefore, 172 samples are needed in order to achieve a
99.5% confidence level.
sf
3. It was reported that students who do online business during this
pandemic crisis earns money with a standard deviation of P2,000.
If you wanted to estimate with 96% confidence the mean income
of students within P450 of the true population mean, how many
students should you select?
Referer
Given: d= 450 C= 96%o= 2,000
n=?
Banigc
Schoo
n =
De G
Publis
(2000
%3D
450
Seba
= (2.05x(4.44)
= (9.1)2
Senic
= 82.81
Cerv
= 83 samples
Deli

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