+125 the lengths of cobs of corn for sale at a supermarket are normally distributed with a mean of 15.2 cm and a standard deviation of 3.3 cm
A farmer had bought a truck load of 250 cobs of corn.
how many cobs of corn will be 18 cm or shorter ?
+36916 18 cm is (18 - 15.2)/3.3 = .8485 (rounded to .85) HIGHER than the mean......look at your POSITIVE z-score table under .85 to find the number .8023 this represents the corn cob fraction that is less than 18 cm
.8023 x 250 =~ 200 corn cobs < 18cm
