Regression 3 TEST

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Xiaodan Leng 5 years, 10 months ago

Created this as a copy of Sorcha's copy of Bill's copy of Regression 3 TEST.

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 pounds). 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	10
prediction	integer	20
b1	number	0.4
owner	string	Michael
sxy	number	2802
res	list	List of 12 items
spxy	number	381.0833333333
ls	number	17.01
tol	number	0.001
tcorr	number	0.6701053983
tsqovern	list	List of 2 items
ssq	list	[ 2163, 4225 ]
sumr	number	322.286
thisval	integer	15
a1	integer	12
pub	string	Slug and Lettuce Pub
corr	number	0.67
a	number	9.433
b	number	0.689
obj	list	List of 12 items
r1	list	List of 12 items
r2	list	List of 12 items
ss	list	List of 2 items
tol1	number	0.01
n	integer	12
beverage	string	ice-filtered cider
t	list	[ 139, 209 ]
sc	integer	11
rsquared	number	0.449

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`

This variable doesn't seem to be used anywhere.

Parts

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

Calculate the sample correlation coefficient $r$ for these data:

$r=\;$Unnamed gap (enter to 2 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
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

This question is not used in any exams.

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Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Xiaodan Leng 5 years, 10 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

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Error

Regression 3 TEST

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Xiaodan Leng 5 years, 10 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`