STA1502 Statistical Inference I (STA1502)
University of South Africa
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STA1502 EXAM PACK 2023
sta1502 exam pack 2023
Latest exam pack questions and answers and summarized notes for exam preparation.
Latest exam pack questions and answers and summarized notes for exam preparation.
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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- R54,57
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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.
- Other • 117 pages • 2022
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- R59,69
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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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- R59,69
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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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