Simon's copy of Regression 3

Error

There was an error loading the page.

Contributors

History

○

Simon Thomas 6 years ago

Created this as a copy of Regression 3.

Name	Status	Author	Last Modified
Bill's copy of Regression 3	Ready to use	Bill Foster	16/11/2020 10:02
Sorcha's copy of Bill's copy of Regression 3 TEST	Ready to use	TEAME UCC	16/11/2020 10:03
Regression 3	Ready to use	Julie Crowley	05/07/2021 15:22
Linear Regression-SES	draft	Lauren Frances Desoysa	16/11/2020 10:03
Simon's copy of Regression 3	draft	Simon Thomas	16/11/2020 10:03
Simon's copy of Regression 3	draft	Simon Thomas	16/11/2020 10:03
Amin's copy of Linear Regression-SES	draft	Amin Ibrahim	16/11/2020 10:02
Ben's copy of Regression 3	draft	Ben Fisher	16/11/2020 10:02
Regression 3	draft	Xiaodan Leng	16/11/2020 10:03
Regression 3 TEST	draft	Xiaodan Leng	16/11/2020 10:03

There are 8 other versions that do you not have access to.

Question statement

{owner} owns the {pub}. {owner} believes that sales of {beverage} in the pub are linked to the average monthly temperature, with higher sales being recorded in months with higher temperatures. To investigate, {owner} records the average monthly temperature in the local town over a period of one year ( $X$ degrees Celsius), along with total monthly sales of {beverage} ( $Y$ hundred euros). The results are shown in the table below:

Month	$\var{obj[0]}$	$\var{obj[1]}$	$\var{obj[2]}$	$\var{obj[3]}$	$\var{obj[4]}$	$\var{obj[5]}$	$\var{obj[6]}$	$\var{obj[7]}$	$\var{obj[8]}$	$\var{obj[9]}$	$\var{obj[10]}$	$\var{obj[11]}$
$X$ (temperature)	$\var{r1[0]}$	$\var{r1[1]}$	$\var{r1[2]}$	$\var{r1[3]}$	$\var{r1[4]}$	$\var{r1[5]}$	$\var{r1[6]}$	$\var{r1[7]}$	$\var{r1[8]}$	$\var{r1[9]}$	$\var{r1[10]}$	$\var{r1[11]}$
$Y$ (sales, €100s)	$\var{r2[0]}$	$\var{r2[1]}$	$\var{r2[2]}$	$\var{r2[3]}$	$\var{r2[4]}$	$\var{r2[5]}$	$\var{r2[6]}$	$\var{r2[7]}$	$\var{r2[8]}$	$\var{r2[9]}$	$\var{r2[10]}$	$\var{r2[11]}$

You are given the following information:

$X$	$\sum x=\;\var{t[0]}$	$\sum x^2=\;\var{ssq[0]}$
$Y$	$\sum y=\;\var{t[1]}$	$\sum y^2=\;\var{ssq[1]}$

Also you are given $\sum xy = \var{sxy}$ .

Give any introductory information the student needs.

			Name	Type	Generated Value

ch	integer	4
prediction	integer	22
b1	number	0.25
owner	string	Mary
sxy	number	3101
res	list	List of 12 items
spxy	number	124.25
ls	number	20.66
tol	number	0.1
tcorr	number	0.2593179759
tsqovern	list	[ 1800.75, 4920.75 ]
ssq	list	[ 2327, 5357 ]
sumr	number	407.016
thisval	integer	21
a1	integer	16
pub	string	County Inn
corr	number	0.26
a	number	17.358
b	number	0.236
obj	list	List of 12 items
r1	list	List of 12 items
r2	list	List of 12 items
ss	list	[ 526.25, 436.25 ]
tol1	number	0.01
n	integer	12
beverage	string	home-brewed lager
t	list	[ 147, 243 ]
sc	integer	14
rsquared	number	0.067
ja	number	17.358
jb	number	0.236
tol2	integer	1

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(0..11)

JME function reference

Description

Describe what this variable represents, and list any assumptions made about its value.

Can an exam override the value of this variable?

Generated value: `integer`

→ Used by:

Parts

Part a) Gap-fill
1. Gap Gap 0. Number entry
  Add
2. Gap Gap 1. Number entry
  Add
1. Step Information only
Part b) Gap-fill
1. Gap Gap 0. Number entry
  Add
2. Gap Gap 1. Number entry
  Add
Part c) Gap-fill
1. Gap Number entry
  Add
1. Step Information only
Part d) Gap-fill
1. Gap Number entry
  Add

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

\[Y = a + b x.\] Using the least squares method to find $a$ and $b$ to 5 decimal places, then input them below to 3 decimal places. You will use these approximate values in the rest of the question.

$a=\;$Gap 0. $b=\;$Gap 1., (enter both to 3 decimal places).

Advice

{regfun(r1,r2,max(r1)+10,max(r2)+10,rsquared,sumr)}

Give a worked solution to the whole question.

Use this tab to check that this question works as expected.

There was an error which means the tests can't run:

Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Information only
Gap-fill
Gap-fill		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Gap-fill
Gap-fill		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Information only
Gap-fill
Gap-fill		Hasn't run yet
Number entry
Number entry		Hasn't run yet

This question is not used in any exams.

Loading...

Error

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Simon Thomas 6 years ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

Loading...

Error

Simon's copy of Regression 3

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Simon Thomas 6 years ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`