The SD card slots on digital cameras are designed to accommodate a card of up to 24mm in width. Due to low sales figures, a manufacturer suspects that the machine used to cut the cards needs to be recalibrated. The widths, wmm, of 400 of these cards were measured and are coded in the following table, where x = w – 24.

a. Suggest a reason why the widths have been coded in this way.

b. What percentage of the SD cards are too wide to fit into the slots?

c. Use the coded data to estimate the mean width of these 400 cards.

Transcribed Image Text:

24 (mm) -0.15