04.05the mean shoe size of the students in a math class is 7.5.most of the shoe sizes fall within 1 standard deviation, orbetween a size 6 and a size 9.what is the standard deviation of the shoe size data for themath class? o 1.5o 27o 3.0o 3.8mark this and returnsave and exitnextஅபமார்

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?