STA2020F
Class Test 2
Date: 16 April 2008
Time: 1 hour
SECTION A (20)
Question 1.
In multiple regression, why is it necessary to test the hypothesis that at least one of the
s differs from 0 before t
MAKE UP TEST MEMO
MCQ [15]
1)D
2)B
am
am
5)A
6)B
7E
8)A
QUESTION 1 [14]
u :3 = Tums -r o-qlSgchs) +~ 0-6r1rbpeaO4-Lo753(grungy,
E ii: LHSis 5,461; : (24;)va (_.)
a: a om: on w: (w
L) bond' "Hf?a ('137
UNIVERSITY OF CAPE TOWN
DEPARTMENT OF STATISTICAL SCIENCES - STA2020F: APPLIED STATISTICS
TEST 2 MAKE UP 15 JUNE 2017
Time: 90 MINUTES
Max Marks: 50
Internal examiners:
Prof R. Altwegg
M
UNIVERSITY OF CAPE TOWN
DEPARTMENT OF STATISTICAL SCIENCES - STA2020F: APPLIED STATISTICS
TEST 1 18 APRIL 2017
Time: 90 MINUTES
Internal examiners:
Mr. R. Altwegg
Mr. K. Stielau
Mr. N.M
MCQ
1) E
2) C
3) A
4) A
5) E
6) D
7) B
8) E
QUESTION 1
a) Species.Richness is the response variable (0.5) and Beach.Type is the explanatory variable (0.5)
[1]
b) H0 is that species
STA2020F Class Test 1 2017 with solutions
QUESTION 1
[11 marks]
In order to compare mean prices at three major supermarkets (Pick n Pay, Spar and Shoprite) an economist
selected 60 food items and boug
UNIVERSITY OF CAPE TOWN
DEPARTMENT OF STATISTICAL SCIENCES - STA2020F: APPLIED STATISTICS
TEST 2 9 JUNE 2017
Time: 90 MINUTES
Max Marks: 50
Internal examiners:
Prof R. Altwegg
Mr. N.M. Watson
Instruct
An Example
Why do mammals sleep?
Multiple Regression Output
SUMMARY OUTPUT
Regression Statistics
Multiple R
0.546673
R Square
0.298852
Adjusted R Square
0.271356
Standard Error
4.015395
Observations
5
Why do giraffes have such long necks?
Hypothesis 1: reach leaves high up in trees.
Hypothesis 2: males with longer and heavier
necks are better at fighting.
Predictions
Allometry (scaling relationship
UNIVERISTY OF CAPE TOWN
DEPARTMENT OF STATISTICAL SCIENCES
STA2020F COURSE INFO SUMMARY SHEET 2017
This document is a summary and has to be read in conjunction with the complete course outline!
GENERA
STA2020F: Applied
Statistics
Simple Linear Regression
Chapter 14 in Statistics for Business and Economics
(3rd Edition)
Res Altwegg
Associate Professor at Dep of Stat Sci
Heading up the centre for S
STA2020 TUTORIAL 9: TIME SERIES ANALYSIS
26 APRIL 2013
Question 1
[17]
Consider the quarterly bicycle sales for a sports shop in Table 1.1:
Year
2008
2009
2010
2011
Quarter
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
UNIVERSITY OF CAPE TOWN
DEPARTMENT OF STATISTICAL SCIENCES
STA2004F CLASS EXERCISE : 19 MAY 2017
Show all your workings.
1. Suppose a random sample of size n is drawn from the probability density func
17 APRIL 2015
STA2020F TUT 8 MEMO
TIME SERIES
QUESTION 1
a) There are four basic steps to performing a time series analysis:
i.
ii.
iii.
iv.
Plot the time seri
17 APRIL 2015
STA2020F TUT 8
TIME SERIES
QUESTION 1
Chad is an aspiring coffee roaster and is seriously considering starting his own business. A
crucial
STA2020F 2015
Tutorial Test 2 a MEMO
Question 1
Fifty children at a local school were subjected to a medical exam in order to determine which
factors are relevant in predicting a scaled cholesterol me
STA2020F 2015
Tutorial Test 2 b MEMO
Question 1
Fifty children at a local school were subjected to a medical exam in order to determine which
factors are relevant in predicting a scaled cholesterol me
STA2020F Tutorial 5 20 March 2015
Multiple Regression
1. Box and Youle (1955) performed a series of 19 experiments to investigate a chemical
reaction. The aim was to establish if a relationship exists
STA2020F Tutorial 5 20 March 2015 - Solutions
Multiple Regression
1. Box and Youle (1955) performed a series of 19 experiments to investigate a chemical
reaction. The aim was to establish if a relatio
STA2020F Tutorial 7 10 April 2015
Multiple Regression/Model Building
Question 1
To determine if the type of adverting is related to the number of customers coming to a shop,
a manager advertised multi
STA2020F Tutorial 6 27 March 2015 Solutions
Multiple Regression
1. Due to the economic crisis in the world, an investment company had to reduce their
staff complement. This resulted in the remaining e
STA2020F Tutorial 6 27 March 2015
Multiple Regression
1. Due to the economic crisis in the world, an investment company had to reduce their
staff complement. This resulted in the remaining employees h
STA2020F Tutorial 7 10 April 2015 Solutions
Multiple Regression/Model Building
Question 1
a) In the stepwise regression procedures, we have and values:
i) What relationship has to be in place between
STA2020F 2015
Tutorial Test 2 b
Question 1
Fifty children at a local school were subjected to a medical exam in order to determine which
factors are relevant in predicting a scaled cholesterol measure
STA2020F 2015
Tutorial Test 2 a
Question 1
Fifty children at a local school were subjected to a medical exam in order to determine which
factors are relevant in predicting a scaled cholesterol measure