Mathematics
Minitab Statistics Questions Discussions

### Question Description

I don’t know how to handle this Statistics question and need guidance.

You will need to be familiar with using the MINITAB. There are 6 simple questions, some questions must use minitab to answer.

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Question 1
The Minitab file that you require for this question should be downloaded from the
‘Assessment’ area on the module website.
The data used in this question are about the numbers of students on three of
the five most popular modules at the OU. The variable ModuleName contains
the name of the module, and the variables 2015/16, 2016/17, 2017/18,
2018/19 contain the number of students at the start of each of the modules
in each of the academic years 2015/16 to 2018/19. The variable
MedianNumber contains the median of the number of students on each
module. These data are given in the Minitab worksheet popular
modules.mtw. Run Minitab and open this worksheet.
The mean number of students on a module over the four years is mean
number = (2015/16 + 2016/17 + 2017/18 + 2018/19)/4.
(a) Calculate by hand the median number of students on AA100 and show all
answer as in the Minitab worksheet.)

To get the median, we arrange values in ascending order. For count of data
that is odd, for example 5, then the median is the middle value but for an
even number count of data, the median is the average of the two middle
values.
For AA100 data;
AA100-The arts past and present

4960

4404

4504

4366

In ascending order; 4366, 4404, 4504,4960
The median = (4404+4504)/2 = 4454
(b) Use Minitab to produce a column of values, headed MeanNumber, containing
the mean numbers of students on each module. Include this
ModuleName
AA100-The arts past and present
B100-An introduction to business and management
MST124-Essential mathematics 1

MeanNumber
4558.5
4138.25
3514.5

(c) Use Minitab to calculate a column of values, headed Diff, containing the
differences between the mean and the median numbers of students on
each module. Use Minitab to round the differences to the nearest whole
number, i.e. zero decimal places, and include this column of

ModuleName
AA100-The arts past and present
B100-An introduction to business and management
MST124-Essential mathematics 1

Diff
105
93
111

(d) The range of the number of students on MST124 over the period is 1209.
Using Minitab, or by hand, calculate the corresponding ranges for
AA100 and for B100. What does the comparison of the ranges tell
you about the numbers of students on MST124?

ModuleName
AA100-The arts past and present
B100-An introduction to business and management
MST124-Essential mathematics 1

Range
594
1086
1209

The ranges for AA100 and B100 are 594 and 1086 respectively. This indicates
that the variability in MST124 is much greater than for the other courses.

Question 2
The Minitab file that you require for this question should be downloaded from the
‘Assessment’ area on the module website.
The data used in this question relate to a measure of UK biodiversity. Insects
are important pollinators and each year the number of 1km grid squares in
which insect pollinators are found is recorded. An ‘occupancy index’ is
calculated from these data and scaled so that for the first year (1980) the
index is 100. (Data source: jncc.defra.gov.uk/page-6851.) These data are given
in the Minitab worksheet pollinators.mtw. In the worksheet, for each year,
the variable All Index contains the occupancy index for all insect
pollinators and the variable Bees Index contains the corresponding
indicator for wild bees only. Run Minitab and open this wor...

mickeygabz (5205)
Cornell University
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