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!
1 Children less than 4 years old or 40 pounds must use a child safety seat meeting federal motor vehicle safety standards. 2  Children less than 8 years old, unless they are at least 4 feet, 9 inches tall must use a booster seat.3  Children ages 8-15 must use a child safety seat or safety belt.s of Oct. 7, 2009, Ohioâs children are required to use belt-positioning booster seats once they outgrow their child safety seats until they are 8 years old, unless they are at least 4 feet, 9 inches (57 inches) tall. Ohioâs child passenger safety law requires the following: