There is no information on how much time can be spent on a call.
No. It's the number that will help you work out the percentage.
A standard deviation in statistics is the amount at which a large number of given values in a set might deviate from the average. A percentile deviation represents this deviation as a percentage of the range.
100 x (standard deviation/mean)
The standard deviation of the population. the standard deviation of the population.
The standard deviation is 0.
No. It's the number that will help you work out the percentage.
4.55% falls outside the mean at 2 standard deviation
A standard deviation in statistics is the amount at which a large number of given values in a set might deviate from the average. A percentile deviation represents this deviation as a percentage of the range.
100 x (standard deviation/mean)
For normally distributed data. One standard deviation (1σ)Percentage within this confidence interval68.2689492% (68.3% )Percentage outside this confidence interval31.7310508% (31.7% )Ratio outside this confidence interval1 / 3.1514871 (1 / 3.15)
The standard deviation is the standard deviation! Its calculation requires no assumption.
no
The standard deviation of the population. the standard deviation of the population.
The standard deviation is 0.
Mean = 100 Standard Deviation = 25 (120 -100) / 25 = 0.80 th z value of .80 from the table = .2881 P(100-120) = 28.81% What percentage of calls are completed in less than 60 minutes ? (60 - 100) / 25 = - 1.6 from the table the z value is .4452 (one side), then : .5000 - .4452 = .0548 P(60) = 5.48%
Information is not sufficient to find mean deviation and standard deviation.
Standard deviation is the square root of the variance.