# statistics

posted by .

find the range,standard deviation, and variance for the following sample date:
98,2,53,61,15,87,63,63,91,29,96,79,93,40,5,62

*please show all calculations for confirmation. thank you very much. i just want to double myself. thank you.

• Name suggestion -

Mary,

If you want people to take you seriously, it would undoubtedly be a good idea to change your screen name to just Mary. The longer you have this "panic mode" thing showing up, the less seriously people will take your posts. It's a form of crying wolf.

• statistics -

Range = highest score - lowest score

Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

I'll let you do the calculations.

• statistics -

There is a tool for that sort of calculation at :
http://easycalculation.com/statistics/standard-deviation.php
The range is obviously 2 to 98
The mean is 58.56
The standard deviation is 32.35
The variance is the square of that

## Similar Questions

1. ### Statistics

Check my answers please! Thanks a lot. Five students reported that the previous night they slept: 7,8,7,10,9 hours. Calculate the sample varience and standard deviation. sample varience = 1346.5 standard deviation = 36.7 Consider this. …
2. ### Statistics: Sample Size, Variance and Standard Dev

Sample Size, Variance and Standard Deviation A student organization plans to ask 100 randomly selected students how much they spent on textbooks last semester. You argue for a sample of 900 students instead of 100. You know the standard …
3. ### statistics

Would someone mind checking me and pointing out which may be incorrect. I THINK I get it but.... Calculate the range, variance, standard deviation for the data set given 72, 80, 80, 82, 88, 90, 96?
4. ### statistics

Find the range, standard deviation, and variance for the following sample data: 98, 2, 53, 61, 15, 87, 63, 63, 91, 29, 96, 79, 93, 40, 5, 62 *please show calculations step by step so that i can compare my work. thank you very much. …
5. ### Please tell me if i did this correct

Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25 This is what I got: Mean = 59.19 Variance = 1.43 …
6. ### college math

20. Calculate the range, variance, and standard deviation of the following data set: 5, 5, 6, 6, 6, 8, 8, 8, 8, 10, 10, 11, 12, 12, 20 (Points: 5) Range = 15; Variance = 225; Standard Deviation = 7.5 Range = 3.85; Variance = 14; Standard …
7. ### statistics

The following data lists the average monthly snowfall for January in 15 cities around the US: 20 9 35 46 44 17 32 25 30 14 28 14 9 15 20 Find the mean, variance, and standard deviation. Please show all of your work.
8. ### statistics college

find the range standard deviation and variance for following sample data 2,11,81,29,22,59,78,71,21,43,99,12,38,74,56,81
9. ### statistics

The following data lists the average monthly snowfall for January in 15 cities around the US: 38 0 47 32 42 31 40 47 35 43 36 17 36 8 1 Find the mean, variance, and standard deviation. Please show all of your work.
10. ### Statistics

The table below shows the LOS for a sample of 11 discharged patients. Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard deviation …

More Similar Questions