There are three schedule options for classes at a high school: 90-minute classes every other day for a year, 90-minute classes every day for a semester, or 45-minute classes every day for a year. out of 1200 students, 50 students from each grade level are chosen at random and asked their preference. identify the population and the sample. a. population: the entire student body sample: 200 students from each grade level c. population: 1200 students sample: 50 students b. population: the entire student body sample: 50 students from each grade level d. population: 1200 students sample: 1200 students

Option B is correct.

Step-by-step explanation:

Population refers to the whole part out of which samples are taken.

Given is : Out of 1200 students, 50 students from each grade level are chosen at random and asked their preference.

Here, the population is the overall student body. And there are 50 samples drawn from each grade.

So, the correct answer is :

b. population: the entire student body sample: 50 students from each grade level

false

step-by-step explanation:

rulers and compasses arent required in order to bisect an angle because when bisecting angles, you're making a "half circle" and considering in order to bisect an angle it wouldn't be straight, you wouldn't need either of the two

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.