Charles Clayton monitors the daily performance of his invest

Charles Clayton monitors the daily performance of his investment portfolio by ... indicate whether the portfolio\'s value increased or decreased from the previous day. His record for the last eighteen business days is “- + + - - - + - - + + + - + + + + -“. The number of runs in this sample is _______?

Solution

The total numbe of runs can be calulated in following way

1) - 2) ++ 3) - - - 4) +   5) - - 6) + + + 7) - 8) + + + + 9) -

thus we have total runs = 9