The quality control officer in a blood center has to take temperature readings of the freezer every half hour to check any change in the temperature he wants to collect the data which graph of would be the best choice to present the data? 1.box and whisker plot 2.circle graph 3.stem leaf plot 4.line graph

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?