For any population with mean Î¼and standard deviation.  The mean, or center of the sampling distribution of, is equal to the population mean Î¼:Î¼ x = Î¼.  The standard deviation of the sampling distribution is Ï/â n, where n is the sample size: Ï x = Ï / â n.
Usually a child should be 13 or older to ride in the front seat. If the child is too small then the front airbags can be dangerous and they may still need a booster seat. When â¦ they outgrow booster seats then they should be large enough to ride on the seat with just seatbelts. Always make sure they are buckled up!
Child Safety Seats. Ohio's child restraint law requires all children under age 4 or weighing less than 40 pounds to ride in a child safety seat. This means that a 5-year-old child who tops the scale at 35 pounds will need to stay in a child safety seat, even though he is old enough to use a booster.