In the series 7+15+23+31 determine:

i) the common difference
ii) the difference between the 10th and 15th terms.
iii) The value of n given that Tn=103
iv) The general term of the series.

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample