Data management pt. 2

Question 1

Statistical measure that represents the entire distribution or a data set using a single value

Answer 1

Measures of Central Tendency

Question 2

sum of all observations/total number (average)

Answer 2

Mean

Question 3

mean that takes into consideration each of the item value without regard to their importance

Answer 3

Simple Mean

Question 4

takes in consideration the proper weights assigned to the observed values according to their relative importance

Answer 4

Weighted Mean

Question 5

the midpoint of the distribution, sometimes denoted by Me or Md

Answer 5

Median

Question 6

number that occurs the most

Answer 6

Mode

Question 7

indicates the extent to which values in a distribution are spread around the central tendency

Low variability = consistent and accurate
High variability = less consistent

Answer 7

Measures of Variation

Question 8

division of observations into 4 defined intervals based on the values of the data and how they compare to the entire set of observation

Answer 8

Quartiles

Question 9

measures the variability around the median
it is the distance between the first and third quartiles

Answer 9

Interquartile range

Question 10

visual summaries of a data set
represents the quartiles and the lowest and highest observations

Answer 10

Box and Whisker Plot

Question 11

ave of the square of the distance each value is from the mean

Answer 11

Variance

Question 12

square root of the variance, it is also the measure of how spread out the data is — distance to mean

Answer 12

Standard Deviation