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 Asking Statistical Questions Identify TWO Variables A PROBLEM: "I wonder if there is a relationship between variable 'A' and variable 'B' from the Census at School 2009 database" The POPULATION must be included in the question Worksheet practicing writing statistical Questions

Given this data what research questions are possible?

Pam’s Pork Pies

 Pie Pie Weight g Pie Volume mL Pie Diameter cm A 377 157 5.1 B 392 165 5.3 C 338 134 4.8 D 333 132 5 E 418 172 5.9 F 402 167 5.3 G 319 118 5.2 H 324 128 4.9

What are the three research questions
possible?

##### “I wonder if there is a relationship between ……….…… and ……………… from the 2009 Census at school Database”

Defining the variables used:

Variables need to be specified, with units and causality considered.

Eg Student height is measured in…
Student arm span is measured in…

There is probably an 'association' between the student height and arm span.

In this case the variables are probably neither ‘explanatory’ nor 'dependant'

Sometimes one variable probably causes the other to change
Eg: Fat content (g) in take away food, and the energy content (calories)