Pearson1

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Julie Crowley

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Ready to use

9 years ago

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Julie Crowley 8 years, 7 months ago

Published this.

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Julie Crowley 9 years ago

Gave some feedback: Ready to use

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Julie Crowley 11 years, 9 months ago

Created this as a copy of Pearson1.

Name	Status	Author	Last Modified
Pearson1	draft	Bill Foster	06/08/2020 08:41
Pearson1	Ready to use	Julie Crowley	24/01/2025 17:11
Exam vesrion of Pearson1	Ready to use	Julie Crowley	13/11/2020 16:01
Simon's copy of Pearson1	draft	Simon Thomas	27/03/2019 11:32

There are 11 other versions that do you not have access to.

Question statement

It is well known that similarity in attitudes, beliefs and interests plays an important role in interpersonal attraction. A researcher developed a questionnaire which was completed by 8 married couples. One question sought to place each individual on a 20 point scale in which low scores represent liberal attitudes and high scores represent conservative attitudes. The data were:

Couple	$\var{obj[0]}$	$\var{obj[1]}$	$\var{obj[2]}$	$\var{obj[3]}$	$\var{obj[4]}$	$\var{obj[5]}$	$\var{obj[6]}$	$\var{obj[7]}$
Wife $(X)$	$\var{r1[0]}$	$\var{r1[1]}$	$\var{r1[2]}$	$\var{r1[3]}$	$\var{r1[4]}$	$\var{r1[5]}$	$\var{r1[6]}$	$\var{r1[7]}$
Husband $(Y)$	$\var{r2[0]}$	$\var{r2[1]}$	$\var{r2[2]}$	$\var{r2[3]}$	$\var{r2[4]}$	$\var{r2[5]}$	$\var{r2[6]}$	$\var{r2[7]}$

Give any introductory information the student needs.

			Name	Type	Generated Value

tsqovern	list	[ 968, 578 ]
obj	list	List of 8 items
r1	list	List of 8 items
r2	list	[ 4, 9, 1, 6, 14, 13, 3, 18 ]
ss	list	[ 274, 254 ]
m	integer	20
k	integer	3
ssq	list	[ 1242, 832 ]
n	integer	8
spcoef	number	0.190
corrcoef	number	0.811
vs	list	[ 0, 0, 0, 0, 1 ]
spxy	number	214
t	list	[ 88, 68 ]
tol	number	0.01
v	list	[ 0, 0, 1, 0, 0 ]
sxy	number	962
ssd	number	16
rr2	list	[ 3, 5, 1, 4, 7, 6, 2, 8 ]
rr1	list	[ 4, 6, 2, 1, 8, 5, 3, 7 ]
d	list	[ 1, 1, 1, -3, 1, -1, 1, -1 ]
marr		Definition of variable `marr` is empty.

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
[t[0]^2/n,t[1]^2/n]

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: `list`

[ 968, 578 ]

← Depends on:

This variable doesn't seem to be used anywhere.

Parts

Gap-fill
1. Gap Gap 0. Number entry
  Add
2. Gap Gap 1. Number entry
  Add
3. Gap Gap 2. Number entry
  Add
4. Gap Gap 3. Number entry
  Add
5. Gap Gap 4. Number entry
  Add
6. Gap Gap 5. Number entry
  Add
1. Step Information only

Gap-fill

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

Wife $(X)$	$\sum x=\;$Gap 0.	$\sum x^2=\;$Gap 1.
Husband $(Y)$	$\sum y=\;$Gap 2.	$\sum y^2=\;$Gap 3.

Also find $\sum xy=\;$Gap 4..

Hence calculate the correlation coefficient $r$ correct to 3 decimal places:

$r=\;$Gap 5.

Advice

The answers to all parts are given on revealing.

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
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Number entry
Number entry		Hasn't run yet
Information only

This question is used in the following exams:

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Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Julie Crowley 8 years, 7 months ago

Julie Crowley 9 years ago

Julie Crowley 11 years, 9 months ago

Error in variable testing condition

Error

Warning

Generated value: `list`

Parts

Gap-fill

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Error

Pearson1

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Julie Crowley 8 years, 7 months ago

Julie Crowley 9 years ago

Julie Crowley 11 years, 9 months ago

Error in variable testing condition

Error

Warning

Generated value: list

Parts

Gap-fill

Generated value: `list`