- #1

- 203

- 0

I have a question that I cannot seem to work the answer for.

the question is.

between 1983-1991 X ~ N (20744,8 xxx xxx) Cant exactly remember the numbers, but how do I get the probability that in 1992 the mean will be at least 21000?

I have calculated the [tex]Z[/tex] value which was about[tex]-7.5[/tex]

will the [tex]Z[/tex] value be the same for the year 1992?

and also the term

**at least 21000**confusex me.

any help would be gratly appriciated as I have to do a similar one tomarrow in my test