Friday

November 21, 2014

November 21, 2014

Posted by **Artmisha** on Friday, May 30, 2014 at 2:16pm.

3. Twelve students were given an arithmetic test and the times (in minutes) to complete it were

10, 9, 12, 11, 8, 15, 9, 7, 8, 6, 12, 10

4. The normal daily temperatures (in degrees Fahrenheit) in January for 10 selected cities are as follows.

50, 37, 29, 54, 30, 61, 47, 38, 34, 61

5. If a history test has a mean of 100 and a standard deviation of 10, find the corresponding z score for a test score of 115.

- Statistic -
**Damon**, Friday, May 30, 2014 at 3:22pmhttp://easycalculation.com/statistics/standard-deviation.php

- Statistic -
**Damon**, Friday, May 30, 2014 at 3:23pm5.

115 - 100 = 15

z score means how many standard deviations away from mean

so

15/10 = 1.5

A+ :)

- Statistic -
**PsyDAG**, Saturday, May 31, 2014 at 1:16pmTo do the calculations yourself for 3 and 4:

Range = highest score - lowest

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

For 5, this is the equation used:

Z = (score-mean)/SD

**Answer this Question**

**Related Questions**

standard deviation - If Professor Wilson found that the test scores of his ...

college math - 20. Calculate the range, variance, and standard deviation of the ...

Consumer math - Complete the chart to find the mean, variance and standard ...

statistic - . The average time a student spends studying just prior to a test is...

math - Using the data in the table, calculate the mean, range, variance, and ...

math - Using the data in the table, calculate the mean, range, variance, and ...

math - Using the data in the table, calculate the mean, range, variance, and ...

statistics - Would someone mind checking me and pointing out which may be ...

Statistics - The table below shows the LOS for a sample of 11 discharged ...

statistics - The times taken to complete a statistics test by all students are ...