STA1502 Statistical Inference I (STA1502)
University of South Africa
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STA1502 EXAM PACK 2023
- Exam (elaborations) • 183 pages • 2023
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STA1502 EXAM PACK 2023
- Exam (elaborations) • 183 pages • 2023
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the document contains the latest questions and answers
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STA1502 EXAM PACK 2023
- Exam (elaborations) • 183 pages • 2023
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STA1502 EXAM PACK 2023
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sta1502 exam pack 2023
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sta1502 exam pack 2023
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STA1502 EXAM PACK 2023
- Exam (elaborations) • 183 pages • 2023
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Latest exam pack questions and answers and summarized notes for exam preparation.
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STA1502 EXAM PACK 2023
- Exam (elaborations) • 183 pages • 2023
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Latest exam pack questions and answers and summarized notes for exam preparation.
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STA1502 EXAM PACK 2024
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STA1502 EXAM PACK 2024 
STA1502 EXAM PACK 2024
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STA1502-Statistical Inference I EXAM PACK 2022.
- Summary • 117 pages • 2022
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STA1502-Statistical Inference I EXAM PACK 2022. CONTENTS 
ORIENTATION iii 
STUDY UNIT 1 
1.1 Introduction 1 
1.2 Inference about the Difference Between Two Population Means: 
Independent Samples 
1 
1.3 Observational and Experimental Data 9 
1.4 Inference about the Difference Between Two Population Means: 
Matched Pairs Experiment 
9 
1.5 Inference about the Ratio of Two Variances 19 
1.6 Self-correcting Exercises for Unit 1 22 
1.7 Solutions to Self-correcting Exercises for Unit 1 23 
1.8 Learn...
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STA1502 EXAM PACK & EXAM PREP 2022.
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STA1502 EXAM PACK & EXAM PREP 2022. 
STA1502 - Statistical Inference I 
 Inference about the difference between two means: 
Independent samples 
STUDY 
Keller Chapter 13 Inference about comparing two populations 
13.1 Inference about the difference between two means: independent samples 
Make sure that you understand figure 13.1 of Keller: Note that we need subscripts to distinguish 
between the parameters of two different variables! 
We are now sampling from two independent populations where th...
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STA1502 EXAM PACK 2022
- Exam (elaborations) • 117 pages • 2022
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STA1502 EXAM PACK 2022. This is a complete and an all-inclusive guide to STA1502 Statistical Inference I. Assume equal variances. 
To obtain a (1 − α)100% confidence interval estimate for the difference between the two 
populations means, (µ1 − µ 2 
), we compute 
(x 1 − x 2) ± t α 
2 
;(n 1+n 2−2) 
u 
s 
2 
pooled( 
1 
n1 
+ 
1 
n2 
) 
(a) t α 
2 
;(n 1+n 2−2) = t 0.025; 25+25−2 = 2.009 
s 
2 
pooled = 
(n1 − 1)s 
2 
1 + (n 2 − 1)s 
2 
2 
n1 + n 2 − 2 
= 
(25 − 1)1292 ...
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