Terms in this set (30)
a result is accurate if it is judged to be close to the true value.
Marking a scale on a measuring instrument.
information, either qualitive or quantitive that has been collected
Where a result does not match the value that was to be affected
the differance between a measured value and a true value.
These are values in a set of results which are judged not to be part of thre variation caused by random uncertainty.
These cause readings to be spread about the true value due to results varying in an unpredictable way from one measurement to the next. Reduce this by taking more measurements and calculating a new mean.
These cause readings to differ from the true value by a consistent amount each time a measurement is made. such as effected by enviroment.
Any indication that a measuring system gives a false reading when the true value of a measured quantity is 0. Not resetting to 0 when nothing is happening.
Data which has been shown to be valid
one in which only the independent variable has been allowed to affect the dependent variable
A proposal intended to explain certain facts or observations
The quantity between readings
Ones in which the there is very little spread about the mean value.
a statement suggesting suggesting what will happen in the future, based on observation, experience or a hypothesis.
max and min value of the independent and independent variables to ensure a pattern is detected.
A measurement is repeatable if the original experimenter repeaed the investigation using same method and equipment and obtains same results.
If the investigation is repeated by another person or by using different equipment or techniques and same results are obtained.
Smallest change in the quantity being measured of a measuring instrument that gives a perceptible change in the reading.
A line graph that shows the relationship between two variables. No points plotted, not scaled.
Value that would be obtained in an ideal instrument
The interval in which the true value can be expected to be a lie with a given value of confidence or probability.
Suitability of the investigative procedure to answer the question being asked. What needs to be controlled is being controlled etc.
conclusion supported by valid data, obtained from an appropriate experimental design and based on sound reasoning
These are physical, chemical or biological quantities or characteristics.
variables have values that are labels
continuous variables can have values that cna be given a magnitude either by counting or by measurement
control variable is one which may, in addition to the independent variable affect the investigation and has to be kept constant and monitored.
what you measure
one you change