Hi,

Entering the Data into an Excel worksheet makes short work out of it.

mean = 23.27 , Yes  349/15

variance = 167.78, See below: (Note: Divisor is 14)

standard deviation is 

x	m	(x-µ)	(x-µ)^2

13	23.27	-10.27	105.473

31	23.27	7.73	59.753

15	23.27	-8.27	68.393

3	23.27	-20.27	410.873

26	23.27	2.73	7.453

47	23.27	23.73	563.113

24	23.27	0.73	0.533

21	23.27	-2.27	5.153

44	23.27	20.73	429.733

13	23.27	-10.27	105.473

4	23.27	-19.27	371.333

28	23.27	4.73	22.373

20	23.27	-3.27	10.693

23	23.27	-0.27	0.073

37	23.27	13.73	188.513

349			2348.934 sum

23.27			167.781  sum/14 

RELATED QUESTIONS

The following data lists the average monthly snowfall for January in 15 cities around the  (answered by ewatrrr)

The following data lists the average monthly snowfall for January in 15 cities around the  (answered by vheroli)

The following data lists the average monthly snowfall for January in 15 cities around the  (answered by KMST)

The following data lists the average monthly snowfall for January in 15 cities around the  (answered by CubeyThePenguin)

The following data lists the average monthly snowfall for January in 15 cities around the  (answered by lynnlo)

The following data lists the average monthly snowfall for January in 15 cities around the  (answered by mark22)

The following data lists the average monthly snowfall for January in 15 cities around the  (answered by jim_thompson5910)

A) The following data lists the average monthly snowfall for January in 15 cities around... (answered by ewatrrr)

(A) Classify the following as an example of nominal, ordinal, interval, or ratio level of  (answered by luckee)