Consider the following sample data values.   1 13 9 11 4 2 14 6 15     ​a) Calculate the range. ​b) Calculate the sample variance. ​c) Calculate the sample standard deviation.

Given the following dataset of the price of a gallon of gas: $2.85; $3.06; and $2.99. Calculate the sample variance. The sample variance, rounded off as instructed, is:

1. Listed below are the top 10 annual salaries​ (in millions of​ dollars) of TV personalities. Find the​ range, variance, and standard deviation for the sample data. Given that these are the top 10​ salaries, do we know anything about the variation of salaries of TV personalities in​ general?   40      38      36      28      20      16      14      11      10.7      9.3   2. Listed below are the amounts​ (dollars) it costs for marriage proposal packages at different baseball stadiums. Find the​range, variance, and standard deviation for the given sample data. Include appropriate units in the results. Are there any​outliers, and are they likely to have much of an effect on the measures of​ variation?   39    45    45    60    65    90    90    135    175    206    250    325    400    2000    2750

Consider the following population data; 0, -4, 2, -8, 10 a) Calculate the population variance. b) Calculate the population standard deviation