Explain the relationship in between variance and standard deviation. Can either of these measures be negative?
The traditional deviation is the optimistic square source of the variance. The traditional deviation and also variance deserve to never be negative. Squared deviations can never it is in negative.

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Describe the difference between the calculation of population standard deviation and also that that sample typical deviation.Let N be the number of data entries in a population and n be the variety of data entries in a sample data set.
When calculating the population standard​ deviation, the sum of the squared deviation is split by​ N, climate the square root of the result is taken. Once calculating the sample standard​ deviation, the amount of the squared deviations is split by n−​1, climate the square source of the result is taken.
When provided a data​ set, one would need to determine if it stood for the population or if it was a sample taken native the population. If the data are a​ population, climate σis calculated. If the data room a​ sample, then s is calculated.

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You are applying for a job at 2 companies. Company A offers starting salaries with μ=$26,000 and σ=$1,000. Agency B offers beginning salaries v μ=$26,000 and σ=$3,000.From which company are you more likely to obtain an sell of ​$28,000 or​ more?
Company B, since data values that lie within one traditional deviation from the median are considered really usual.
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