Tuesday

November 25, 2014

November 25, 2014

Posted by **Jake** on Thursday, February 1, 2007 at 12:35pm.

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. Ths standard deviation can

mean = 8.2

Differences obtained by subtracting the score from the mean =

1.2

.2

1.2

-1.8

-.8

Squaring each of these gives you

1.44

.04

1.44

3.24

.64

Totaling 6.8. Dividing this by N (5) gives you 1.36 = variance

The square root of the variance is the standard deviation.

I hope this helps. Thanks for asking.

**Answer this Question**

**Related Questions**

AP Statistics - A school psychologist reports that the mean number of hours the ...

statistics - It has been reported that 86% of federal government employees use ...

statistics - Question 1 A school psychologist reports that the mean number of ...

statistics - The mean length of a work week for the population of workers was ...

statistics - In a random sample of 50 babies 4 to 7 month old the average number...

statistics - In a random sample of 50 babies 4 to 7 month old the average number...

Statistics: Sample Size, Variance and Standard Dev - Sample Size, Variance and ...

statistics - ten randomly selected people were asked how long they slept at ...

Statistics - 28. A group of statistics students decided to conduct a survey at ...

statistics - My mean is 175.5 My standard deviation is=90.57 Sample=25 ...