You are babysitting for your neighbor's child who just turned one. you are playing with the child's favorite stuffed bear but you notice that when you put the bear behind your back the child makes no attempt to find it and just starts to cry. developemental psychologist would definately say that the child has not developed:

Astudy was conducted to determine the proportion of people who dream in black and white instead of color. among 306 people over the age of 55, 68 dream in black and white, and among 298 people under 25, 13 dream in black and white ( based on data from do we dream in color) we want to use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion of those under 25.