Regression

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Yvonne Wancke

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Has some problems

3 years, 2 months ago

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Yvonne Wancke 3 years, 2 months ago

Gave some feedback: Has some problems

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Yvonne Wancke 4 years, 2 months ago

Gave some feedback: Ready to use

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Yvonne Wancke 4 years, 2 months ago

Published this.

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Yvonne Wancke 4 years, 2 months ago

Created this as a copy of Regression2.

Name	Status	Author	Last Modified
Regression2	draft	Bill Foster	06/08/2020 08:41
Regression	Has some problems	Yvonne Wancke	16/02/2022 15:32
PRAC Regression	Ready to use	Yvonne Wancke	26/06/2023 16:50
Yvonne's copy of PRAC Regression	Ready to use	Yvonne Wancke	01/03/2023 12:25
S2 EXAM Regression	Ready to use	Yvonne Wancke	05/05/2023 04:33

There are 5 other versions that do you not have access to.

Question statement

To monitor its staff appraisal methods, a personnel department compares the results of the tests carried out on employees at their first appraisal with an assessment score of the same individuals two years later. The resulting data are as follows:

Employee	$\var{obj[0]}$	$\var{obj[1]}$	$\var{obj[2]}$	$\var{obj[3]}$	$\var{obj[4]}$	$\var{obj[5]}$	$\var{obj[6]}$	$\var{obj[7]}$	$\var{obj[8]}$	$\var{obj[9]}$
First Test $(X)$	$\var{r1[0]}$	$\var{r1[1]}$	$\var{r1[2]}$	$\var{r1[3]}$	$\var{r1[4]}$	$\var{r1[5]}$	$\var{r1[6]}$	$\var{r1[7]}$	$\var{r1[8]}$	$\var{r1[9]}$
Later Score $(Y)$	$\var{r2[0]}$	$\var{r2[1]}$	$\var{r2[2]}$	$\var{r2[3]}$	$\var{r2[4]}$	$\var{r2[5]}$	$\var{r2[6]}$	$\var{r2[7]}$	$\var{r2[8]}$	$\var{r2[9]}$

Give any introductory information the student needs.

			Name	Type	Generated Value

tsqovern	list	[ 41731.6, 13176.9 ]
a	number	5.612
b	number	0.475
obj	list	List of 10 items
r1	list	List of 10 items
r2	list	List of 10 items
ss	list	[ 240.4, 480.1 ]
res	list	List of 10 items
ssq	list	[ 41972, 13657 ]
n	integer	10
a1	integer	13
ch	integer	7
spxy	number	114.2
t	list	[ 646, 363 ]
tol	number	0.001
sc	integer	70
sxy	number	23564
b1	number	0.35
ls	number	38.86

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`

[ 41731.6, 13176.9 ]

← Depends on:

This variable doesn't seem to be used anywhere.

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
1. Step Information only

Gap-fill

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

Calculate the equation of the best fitting regression line:

\[Y = a + b \times X.\] Find $a$ and $b$ to 5 decimal places, then input them below to 3 decimal places.

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

Advice

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:

Numbas Error: Part b: This part contains an invalid variable replacement for adaptive marking.

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
Information only

This question is used in the following exam:

CL2603StatsWeek4 by Ben Parker in Ben's workspace.

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Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

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Checkpoint description

Yvonne Wancke 3 years, 2 months ago

Yvonne Wancke 4 years, 2 months ago

Yvonne Wancke 4 years, 2 months ago

Yvonne Wancke 4 years, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: `list`

Parts

Gap-fill

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Error

Regression

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Yvonne Wancke 3 years, 2 months ago

Yvonne Wancke 4 years, 2 months ago

Yvonne Wancke 4 years, 2 months ago

Yvonne Wancke 4 years, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: list

Parts

Gap-fill

Generated value: `list`