Question

a researcher has a data set with a mean score of 45 and standard deviation of 15 . Assuming that the data set is normally distributed, the researcher would expect approximately 95% of the data to fall between

a 35 and 55

b 30 and 60

c 40 and 50

my answer is c

can some one draw the bell curve and show me step by step how this is done .

thanks

Answer 1

مر) زتا ازا - 114 147 ) را According to endirical 66-95-997 me و الملا : . با ما :451 کا راز الجزء 1 14 و + را : .1-45 (51)67sha Orisha ار 19 15 and 751 so, it fall blw 15 and 75 St Puosi=off 3ے 1- ۔ ال ي ج م 5 کا کا۔ 20 و 30