STATISTICS BEC1 EXAM WITH GUARANTEED ACCURATE ANSWERS
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Course
STATISTICS BEC1
Institution
STATISTICS BEC1
Variable - ACCURATE ANSWERS any characteristics that can and does assume different values for different people, objects or events.
4 measurement scales for variables - ACCURATE ANSWERS nominal, ordinal, interval ratio
Nominal scale (categorizational) - ACCURATE ANSWERS numbers simply used as ...
STATISTICS BEC1 EXAM
STATISTICS BEC1 EXAM WITH GUARANTEED ACCURATE ANSWERS
Variable - ACCURATE ANSWERS✔✔ any characteristics that can and
does assume different values for different people, objects or events.
4 measurement scales for variables - ACCURATE ANSWERS✔✔
nominal, ordinal, interval ratio
Nominal scale (categorizational) - ACCURATE ANSWERS✔✔
numbers simply used as a code to represent characteristics such as
ethnicity. No order to category, assignment of numbers to categories is
arbitrary or random.
E.g. Male = 1 and Female = 2
These variables may be called categorical or qualitative
, Ordinal scale (rank ordering) - ACCURATE ANSWERS✔✔ numbers
represent categories that can be placed in meaningful numerical order
e.g. Lowest to highest. No information regarding size of the interval
between the different values. Sized of interval may be different between
different categories. There is no true zero, they are subjective eg pain
scale, satisfaction scale based on perception. Almost all subjective scales
are ordinal also military rank.
Interval scale - ACCURATE ANSWERS✔✔ numbers can be placed in
meaningful order, intervals between are equal. Possible to add and
subtract across an interval scale. No true zero. Ratios cannot be
calculated. E.g. Fahrenheit temperature. Cognitive exams. Either
continuous or discrete
Ratio scale (numerical ordering) - ACCURATE ANSWERS✔✔
numbers can be placed in meaningful order. Intervals between numbers
are equal. There is a true zero, determined by nature, which represents
the absence of the phenomena. Almost all biomedical measures are ratio
scale. E.g. Weight, age, number of minutes spent exercising, pulse rate,
height cholesterol level. All mathematical operations are possible
Displaying data - ACCURATE ANSWERS✔✔ overall goal is to get
feeling for distribution data. Considerations are central tendency,
dispersion, shape and skewness, outliers
Central tendency - ACCURATE ANSWERS✔✔ most frequently
occurring values. E.g. Mean, median, mode
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