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)
The standard deviation is the standard deviation! Its calculation requires no assumption.
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)
no
The standard deviation of the population. the standard deviation of the population.
The standard deviation is 0.
Information is not sufficient to find mean deviation and standard deviation.
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%
Standard deviation is the square root of the variance.