Join TSR now and get all your revision questions answeredSign up now

Interval for ISA?

Announcements
    • Thread Starter
    Offline

    1
    ReputationRep:
    Does a lower interval mean that there are more results within a given range? So if I decrease my interval, does that make me more sure that the line of best fit is correct?
    Offline

    2
    ReputationRep:
    Smaller intervals mean you will be collecting more results within your range.

    Example: I am taking measurements between 10cm and 30cm. If my intervals are 10cm apart, I would end up with results at 10cm, 20 and 30cm...so three in total.

    If I decrease the interval size to 5cm, I would collect results at 10cm, 15cm, 20cm, 25cm and 30cm - 5 in total.

    I now have more points of data and can be more confident in the pattern that the results are indicating as the relationship between the independent and dependent variables.
    • Thread Starter
    Offline

    1
    ReputationRep:
    Thankyou!
 
 
 
Poll
Do you have exam superstitions?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.