Tuesday

October 21, 2014

October 21, 2014

Posted by **RACHELLE** on Friday, April 27, 2012 at 10:56pm.

A) determine the percentage of finishers with times between 45 and 75 min

B) determine the percentage of finshers less than 80 min

C) obtain the 30th percentile

D) find the 8th decile

- STATS -
**PsyDAG**, Saturday, April 28, 2012 at 8:17pmZ = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

Reverse the process for the last 2 problems.

30th percentile = lowest 30%

8th decile = lowest 80%

**Answer this Question**

**Related Questions**

Statistics - As reported in Runner's World magazine, the times of the finishers ...

Math -Data management Grade 12 - 10 year old kids were asked to run around the ...

Stats-please help - using a=0.05, test for mean 1 greater than mean 2. group n ...

biostatistic - recent suggestion is 60 min of exercise per day. A sample of 50 ...

college-Stats - A certain geyser was determined to have eruptions with a Mean ...

math - help i have a graph that shows the finishing times of the first 5 runners...

Statistics - The height of a certain species of a tree are normally distributed ...

Statistics - two samples of data regarding salary of Co A and Co B determine if ...

MATH!! - TO be on the 1-km race team, Celia must have a mean time less than 5 ...

physics - A person travels by car from one city to another with different ...