PLZ HELP ASAP

Data Set 30 20 35 25 15

a. Use the table above to find the mean, median, range, standard deviation and variance of the data set

• Mean =
• Median =
• Range =
• Standard Deviation =
• Variance =

b. What effect will adding 10 to every value in the data set have on the standard deviation? Will this effect be the same by adding any number to all of the data values? Explain. (2 points)
• Standard Deviation =

c. What will be the effect on the standard deviation if you if you multiply each value by 10? Will this effect be the same by adding any number to all of the data values? Explain. (2 points)
• Standard Deviation =