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Running head: Descriptive statistics and interpretation
Descriptive Statistics
Name
QNT/561
Date
Instructor’s Name
1
Running head: Descriptive statistics and interpretation
Descriptive statistics
Central tendency
Mean: average set of data
Median: the middle number when the numbers are ordered. If set is even, the median is the
average of the two middle numbers.
Mode: most frequent number.
Dispersion
Standard deviation = is a measure of the spread of scores within a set of data.
Interquartile range (IQR) = is the difference of Q3third quartile and Q1 first quartile.
Range = difference between the maximum and minimum scores in a data set.
Confidence interval is a range, from mean minus standard error to mean plus standard error.
Average units produced per day per shift
Central Tendency:
Mean 222
Median 236
Mode 240
Dispersion:
Standard deviation 30.8976806
Count:888
Min/Max:176/240
2
2
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