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!
Ohio law requires the following: 1  Children under 4 years old OR less than 40 lbs.: Must use a safety seat at all times. 2  Children under 8 years old: Must use a booster seat UNLESS the child reaches 4 feet 9 inches or taller. 3  Children 8 through 15 years old: Must wear a seat belt at all times.