A biologist is studying a species of bear with a mean gestational period of 110 days with a standard deviation of 18 days. Data for gestational periods of this species are normally distributed. 68% of bears have a gestational period between Question Blank 1 of 4 type your answer... days and Question Blank 2 of 4 type your answer... days. 95% of bears have a gestational period between Question Blank 3 of 4 type your answer... days and Question Blank 4 of 4 type your answer... days