how do you find the mean & stndrd dev. when ur only given the z-score & mark. e.g:
a set of scores has a z-score of -1, corresponding to a mark of 26, & a z-score of -3, corresponding to a mark of 20. what's the mean and standard deviation of this set of scores.
oh and another thing, whith probability, how do you answer this Q:
4 friends : A, B, C, D are gonna sit 2getha.
a)in how many different ways will they be sitting 2gethha.
b) in how many of these ways will A & B be sitting next to ea. other?
Thanx. Goodluck 2morrow evry1!
a set of scores has a z-score of -1, corresponding to a mark of 26, & a z-score of -3, corresponding to a mark of 20. what's the mean and standard deviation of this set of scores.
oh and another thing, whith probability, how do you answer this Q:
4 friends : A, B, C, D are gonna sit 2getha.
a)in how many different ways will they be sitting 2gethha.
b) in how many of these ways will A & B be sitting next to ea. other?
Thanx. Goodluck 2morrow evry1!
