Thanks Geeker and PS
I, too, studied statistics in the dim and distant past, so this term for maverick was familiar to me. I should clarify that I saw the group in question in 1964 or 1965 in the now infamous Colston Hall, which makes me over 70. No wonder, I need all the help I can get! I also got the writer, so I've finished.
Thanks to everyone for the help. I used to be able to finish these puzzles on my own.
Montelbano was good. No doubt I'll be back next week asking for help.