Question

(3) Bulldog's weights are normally distributed with an average 42 pounds with standard deviation of 3.5 pounds in a certain study. Use the 68-95-99.7 rule to determine the typical ranges of the bulldog's weights. a In what range will approximately the middle 68% of the bulldog's weights lie? Between lbs and lb In what range will approximately the middle 95% of the bulldog's weights lie? Between lbs lbs and In what range will approximately the middle 99.7% of the bulldog's weights lie? Between lbs and lbs 17
im so lost! any help will be appreciated

Answer 1

Mean e nomal distributie, u42 pounds Stundard devi atim, r3-5 poundr Given: to fhe 6&-35-93-7 Accordiy le (empirical rule) Ht - 68 y data Lie hetoec u-a and Mtr appreximatehy he midd le 6 &1. he bull doy'seitr lie behocen qud uto Lis u-T 42-3.16s aud 1+ 3.S 1s = 38.S s and 45 s bs 9s/ data Lie behoecn M-15 aud ut2r. 95% 4-20 apponimalely te mildlu gs u ne bulldgs weisuts lic betceay u-2 las and 2r lbs = 4{-335) lbs and +2(3) = 4-7 - 35 6s and 49 Lhs sS and 43+ 7 L4s 99-77 dala ic serocen -3r and Mt R 957/ A DOS M-30 appreritly ic behuecn A-3r and u+30 he middlle 9.7. he bulldog's weislts 4マ-3(3-5)s +3いS and 4ス - 31 S Ibs and 525 L =