Question

standard normal proportions. use table b to find the proportion of a standard normal distribution that is below -1.42, above 1.42, below 1.25, between 1.42 and 1.25

[ Bm) fs equal to"weight in kilograms,/ divided by n. height in meteus shudy by the Nofonal Center for Health Sfhrfcer Suggecked het wemen behueen the ager of to and 29 in the Uniked Stotes houe o mean Bmi of te & wrth a starderd deviahen of r4, ket ut acume thst these s re ormoly dstnbufed a) A BMİ a 30 er greatert cla4"ifred ar being cverweight. I ho pr Portion of cemen in this age range are oveueight accorting to th definshen?

Answer 1

In the present scenario, A study by the National Center for Health Statistics suggested that women between the ages of 20 and 29 in the United States have a mean BMI of 26.8 with a standard deviation of 7.4. Let us assume that these BMIs are Normally distributed.

Then we can assume that the Mean BMI, M=26.8

and the standard deviation is 7.4

Let assume that X represents the BMI scores. Thus we can calculate the proportion of the age group of overweight as :

Therefore we can say that 65.5% of women in this age group range are overweight