75  Decimal Baby Weights 6.19 7.13 8.31 7.81 7.38 6.88 7.31 5.00 9.00 7.25 7.56 7.25 5.94 8.69 8.56 6.94 7.06 6.38 6.94 6.13 8.38 7.00 8.56 8.38 6.81 7.06 7.44 7.13 6.69 8.06 7.25 9.31 7.38 8.06 7.06 7.06 7.19 6.06 8.44 7.94 8.25 7.44 7.38 6.31 6.88 7.31 7.56 5.75 7.06 10.19 7.38 6.94 6.38 4.69 8.44 7.19 6.44 7.06 6.38 5.69 6.00 9.38 8.88 6.81 9.50 8.56 6.81 8.50 7.06 5.06 9.81 6.19 7.50 6.25 6.88   Make a stemplot of the weights. Is the shape roughly normal? (symmetric mound shaped) Use your calculator's STAT features to find the mean and standard deviation.   Based on these values what fraction of babies would weigh less than 7.5 pounds? Is the actual fraction under 7.5 pounds about the same as your computed value?   Based on these values what fraction of babies would weigh more than 9 pounds? Is the actual fraction over 9 pounds about the same as your computed value?   Based on these values what fraction of babies would weigh between 6.5 and 8.5 pounds? Is the actual fraction between 6.5 and 8.5 about the same as your computed value?   Based on these values how heavy should a baby be so that it is in the bottom 20% of baby weights? Is the actual proportion in the range you found close to 20%?