6. A distribution consists of three components with frequencies 200, 250 and 300 having means 25,10, and 15 and standard deviations 3, 4, and 5 respectively.
Calculate
The mean?
The standard deviation?

Auser is given read permission to a file stored on an ntfs-formatted volume. the file is then copied to a folder on the same ntfs-formatted volume where the user has been given full control permission for that folder. when the user logs on to the computer holding the file and accesses its new location via a drive letter, what is the user's effective permission to the file? a. read b. full control c. no access d. modify e. none of the above