Simon's copy of Julie's copy of Mean from a frequency table - classes

Error

There was an error loading the page.

Contributors

History

○

Simon Thomas 5 years, 11 months ago

Created this as a copy of Julie's copy of Mean from a frequency table - classes.

Name	Status	Author	Last Modified
Julie's copy of Mean from a frequency table	draft	Julie Crowley	08/10/2016 20:34
Julie's copy of Mean from a frequency table - classes	draft	Julie Crowley	08/10/2016 20:34
Mean, median and mode from a frequency table with classes 1	draft	Julie Crowley	06/03/2017 15:00
Mean, median and mode from a frequency table with classes 2	draft	Julie Crowley	06/03/2017 15:00
Mean, median and mode from a frequency table with classes 2b	draft	Julie Crowley	06/03/2017 15:01
Mean, median and mode from a frequency table with classes 1(b)	draft	Julie Crowley	16/04/2018 18:01
Mean, median and mode from a frequency table with classes 2c	draft	Julie Crowley	06/03/2017 15:04
Mean, median and mode from a frequency table with classes 1c	draft	Julie Crowley	07/03/2017 14:49
Catherine's copy of Mean, median and mode from a frequency table with classes 2c	draft	Catherine Palmer	02/03/2018 14:45
Catherine's copy of Mean, median and mode from a frequency table with classes 1c	draft	Catherine Palmer	02/03/2018 14:47
Mean and median from a frequency table with classes 1(b)	draft	Julie Crowley	25/04/2018 18:41
Mean and mode from a frequency table with classes 1c	draft	Julie Crowley	25/04/2018 18:42
Mean and standard deviation from a frequency table with classes 1c	draft	Julie Crowley	25/04/2018 18:43
Michael's copy of Mean and standard deviation from a frequency table with classes 1c	draft	Michael Proudman	07/12/2021 09:49
Simon's copy of Julie's copy of Mean from a frequency table	draft	Simon Thomas	27/03/2019 09:32
Simon's copy of Julie's copy of Mean from a frequency table - classes	draft	Simon Thomas	27/03/2019 09:40

There are 19 other versions that do you not have access to.

Question statement

In CITech Ltd there was a special fundraising drive among staff for ebola affected regions of Africa. A sister of one of the staff is an aid worker in Africa. The frequency table below describes the amount in euro donated by individual staff. Calculate the mean for the data.

Give any introductory information the student needs.

			Name	Type	Generated Value

a	integer	2
c	integer	5
b	integer	4
d	integer	6
f	integer	3
q	integer	100
p	integer	110
s	integer	120
r	integer	130
t	integer	140
stdev	decimal	dec("1.208304597359457206828283926680785569831e+1")
Answer	rational	122
x	integer	90
Total	integer	2440
data	list	Nested 5×2 list

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(0..3)

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:

Total
data
f
stdev

"Unnamed part" - prompt

Parts

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.

Class ( in euro)	frequency
{q-5} but less than {q+5}	{a}
{p-5} but less than {p+5}	{b}
{s-5} but less than {s+5}	{c}
{r-5} but less than {r+5}	{d}
{t-5} but less than {t+5}	{f}

Mean: Unnamed gapeuro (correct to 2 decimal places)

Advice

To find the mean use the formula $\frac{\Sigma fx}{\Sigma f}$

In this question, we have intervals rather than exact values for $x$ (e.g. the first interval is " $\var{q-5}$ but less than $\var{q+5}$ ")

So when calculating ${\Sigma fx}$ we are going to use the midpoint of each interval as our values of $x$ (e.g. the first interval we will use $\frac{\var{q-5}+\var{q+5}}{2} = \var{q}$ )

Hence:

$\Sigma fx= (\var{a} \times \var{q}) + (\var{b} \times \var{p}) +( \var{c} \times \var{s}) + (\var{d} \times \var{r}) + (\var{f} \times \var {t}) = \var{Total}$

mean $=\frac{\Sigma fx}{\Sigma f}= \var{Total} \div 20 =\var{Answer}$

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

This question is used in the following exams:

Loading...

Error

Simon's copy of Julie's copy of Mean from a frequency table - classes

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Simon Thomas 5 years, 11 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

Loading...

Error

Simon's copy of Julie's copy of Mean from a frequency table - classes

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Simon Thomas 5 years, 11 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`