Astudy was conducted to investigate the relationship between maternal smoking during pregnancy and the presence of congenital malformations in the child. among children who suffer from an abnormality other than down's syndrome or an oral cleft, 32.8% have mothers who smoked during pregnancy. this proportion is homogeneous for children with various types of defects.

a) if you were to select repeated samples of size 25 from this population, what could you say about the distribution of the sample proportions? list 3 properties.

b) among the samples of size 25, what fraction has a sample proportion of .45 or higher?

c) what fraction has a sample proportion of .20 or lower?

d) what value of p cuts off the lower 10% of the distribution?

answer:

it will cost 480 dollars to refurbish the larger wood floor

step-by-step explanation:

as it's a ratio of 4 that costs 384 dollars, divide the price by the ratio

384 / 4 = 96 dollars

96 dollars per unit of the ratio

now to get the price to refurbish the larger wood floor, times the price by the units

96 * 5 = 480

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

dont think so

step-by-step explanation:

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.