Problem 8

A study was conducted to assess the effects that occur when children are exposed to cocaine before birth. Children were tested at age 4 for object assembly skills. The 190 children born to cocaine users had a mean of 7.3 and a standard deviation of 3. The 186 children not exposed to cocaine had a mean score of 8.2 with a standard deviation of 3. Use to test the claim that prenatal cocaine exposure is associated with lower scores of four year-old children on the test of object assembly. any method.

can be use such as the P-value or Traditional...