Posted by **lauren** on Sunday, February 17, 2008 at 6:56pm.

For this class, the first quiz had a mean of 90.4% with a standard deviation od 16.6%. The homework scores have a mean of 81.7% with a standard deviation of 22.28%. Suppose you scored 90% on quiz one and have a homework total of 84%.

A)are the reported means and standard deviations, parameters or statistics? explain

b)a student is chosen at random. His homework scores are higher than 65% of the class. find his homework score.

- statistics -
**Damon**, Sunday, February 17, 2008 at 7:35pm
A) sorry, never took the subject so do not know the words, am physics major.

B)

homework mean = 81.7

homework s = 22.28

on a normal distribution table, 65% of class is below mean + .4 sigma = 81.7+8.912 = 90.6

so his score is above 90.6

## Answer This Question

## Related Questions

- Statistics - Suppose that 40 students take a quiz and everyone in the class ...
- stats - Relatively speaking, which statistics exam did you do better on? On ...
- probability and statistics - Suppose every student in your class got a score of ...
- Statistic - Suppose that 15 students take a quiz and everyone in the class ...
- Stastics - When we convert x-value to z- score and use Standard Normal ...
- Statistics - Students were given an exam with 300 multiple-choice questions. The...
- math - Statistics: Analyze student exam scores Students were given an exam with ...
- math - Miss C gives a test to the 10 students in her first-period algebra class...
- Statistics - A college statistics class conducted a survey of how students spend...
- Statistics - hi i need help calculating the standard error using the central ...

More Related Questions