research methods - MATHS Flashcards
evaluate quantitative data
+objective
+quicker to analyse
- lacks depth - no matter how complex score system is they cannot acyurratley reflect complex human behaviour
evaluate qualitative data
+detailed
-subjcetivee interpretation
- longer to analyse
what is primary data?
collected by researcher
evaluate primary data
+research will fit the aim
-time consuming
what is secondary data?
data found by someone else - meta analysis
evaluate secondary data
+cost effective because dont have to conudct research
+time effective
- may not fully match aims
-cabt b certain on quality of data
what are the measures of central tendency
mean
mode
median
evalauate the mean
+accounts all data
-effected by extreme values
evaluate mode and meadian
not effected by extremes
doesnt consider all data
what are the measures of dispersion
range
standard deviation
evaluate range
+simple
-extreme values
evaluate SD
+not effected by extreme values
-complicated
what is sd
shows how far from the mean the majority of the data is. Shows the extent of variance and individual differeces
what does a small sd mean?
the data is consistent and has little variance/individual differences
template for interpreting mean in exam question
the mean score on average sugests….. the mean for … was which is higher/lower than the mean score for….. This means that on average …….
template for interpreting sd in exam question
the sd suggests the spread of data was more consistent for ….
this is because the sd for … was … which is lower than the sd for … which was … This means that ….. has more/less variance and individual differences.
describe a positivley skewed curve on a normal distrubtion
the hump is closer to origin
mode is low - always at the tip of the hum
median is centre
mean is high
describe a negativley skewed normal distrubution curve
hump is on the right
mode is high - aT THE TOP OF THE HUMP
mean = centra
median = middle of them
describe bell shaped normal distrubution curve
symetrical
mode,meadian and mean are all in the cetnre (roiughly)
describe bell shaped normal distrubution curve
symetrical
mode,meadian and mean are all in the cetnre (roiughly)
what are the 8 stats test?
chi square
sign test
mann whitney
wilcoxon
spearmen rho
person
realted t test
unrelated t test
what stats test are used in differences?
realted t test
unrelated t test
chi square
sign test
mann whitney
wilcoxon
what stats test are used for a correlation?
spearmen rho
person
chi square
what tests are used in nominal data?
chi aqaure test
sign test
what tests are used in ordinal data?
mann whitney
spearmen rho
wilcoxon
what tests are used in interval data?
unrealted t
related t
pearson
when do u do a chi square test?
nominal unrealted data for difference and correlation
when do u use sign test?
related nominal data
when do u do mann whitney?
unrelated ordinal
when do u do wilcoxon?
related ordinal