The height in cm was determined for three students enrolled in ap biology. the data is as follows: 161 cm, 170cm, 160cm calculate the standard error. * a. 9.75 b. 5.5 c. 95 d. 3.2 e. there is not enough information to do the calculation

set of data [161,170,160]

step 1

Find the mean

 [161+170+160]/3=163.67 cm

step 2

 for each number: subtract the Mean and square the result

(161-163.67)²----->7.1289

(170-163.67)²----> 40.0689

(160-163.67)²----> 13.4689

step 3

 work out the mean of those squared differences

[7.1289+40.0689+13.4689]/(3-1)=30.33

step 4

Take the square root of that

S=√30.33------> 5.51 cm

SE=S/√n--------> 5.51/√3------> 3.18-------> 3.2 cm

the answer is

3.2 cm    

see the attached formulas

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

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.