# Category Archives: Unit 1 Statistics and Number

## Complex Calculations and Accuracy

Overview Com­plex Cal­cu­la­tions and Accu­racy cov­ers using knowl­edge and your cal­cu­la­tor to manip­u­late num­bers. Top­ics include com­pound inter­est, per­cent­age change, stan­dard form, upper and lower bounds and absolute and per­cent­age error. I think half the bat­tle for these ques­tions is know­ing … Con­tinue read­ing

## Ratio and Proportion

Overview This starts off with with rea­son­ably easy stuff about every­day ratios and pro­por­tions and then builds into more demand­ing stuff about using equa­tions to solve prob­lems involv­ing inverse pro­por­tion. The more demand­ing top­ics are Grade A, and I think … Con­tinue read­ing

## Cumulative Frequency

Overview In order to under­stand and use cumu­la­tive fre­quency, you need knowl­edge cov­ered in Data Col­lec­tion, Inter­pret­ing and Rep­re­sent­ing Data and Range and Aver­ages. None of the con­cepts are too dif­fi­cult. You need to be able to com­plete cumu­la­tive fre­quency … Con­tinue read­ing

## Probability

Overview Prob­a­bil­ity There is some jar­gon to learn: mutu­ally exclu­sive events, com­bined events, expected fre­quency, rel­a­tive fre­quency, exper­i­men­tal prob­a­bil­ity, esti­mated prob­a­bil­ity, inde­pen­dent events and the­o­ret­i­cal prob­a­bil­ity. This may seem a lit­tle intim­i­dat­ing but with a lit­tle prac­tice their mean­ing becomes … Con­tinue read­ing

## Range and Averages

Overview Range and Aver­ages I find this sec­tion not too demand­ing. You have to learn some terms (range, mean, mode and median) and one or two tech­niques (for exam­ple, how to esti­mate the mean from a grouped fre­quency table). There … Con­tinue read­ing