Question

What is the standard deviation of the data set?
14 34 23 50 25 16 48

a. about 35.6

b. about 26.8

c. about 14.5

d. about 13.4
my answer: c. about 14.5
or is it d?? idk please help i got confused... on the scientific calculator, is Sx the symbol for standard deviation? or is it something else?

Answer 1

Erm I duno what type of ur calculator are
But
My calculator show the ans is D

Answer 2

Mayb we should do it manually to find it.

Answer 3

my calculator is TI-84 plus texas instruments calculator.... what is the symbol or standard deviation on a calculator?

Answer 4

@iheartfood Your calculation agrees with mine. Sx is correct for calculation of an estimate of the Standard Deviation based on a small sample. Lower case sigma is the symbol for the population standard deviation.

Answer 5

So the answer is C 14.5 right??? @kropot72

Answer 6

Standard Deviation=
sqrt(total of x^2/n- mean^2)

Mean =30 as i counted
Total of x^2 =7566
7566/7=approx 1080

1080-900=180
sqrt 180=approx 13.41

Answer 7

The answer is 14.5 (rounded to one decimal place because it is only an estimate of the population standard deviation).

Answer 8

okay, thx

Answer 9

You're welcome. Note: There is often confusion as to how to estimate the standard deviation of a small sample when details of the parent distribution are not known.

Answer 10

On second thoughts, the question does not state that the data is from a sample. Therefore in this case the sample standard deviation calculation is not appropriate. The standard deviation is choice d. "about 13.4"

Answer 11

the answer is D? is this according to the formula/equation @kropot72

Answer 12

According to the calculated square root of the variance\[\sigma ^{2}=\frac{\Sigma[(X-Xbar)^{2}]}{n}\]

Answer 13

oh okay thanks :)