anoneemose

A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. How many bulbs should have a life expectancy between 400 and 600 hours?

In a competitive application process, two applicants were closely matched and the judges needed to compare their percentile ranking to see who should be offered the last position.Jeremiah ranked 405th in a class of 1,200 and Joshua ranked 12th in a class...

Twelve college students were surveyed about the distance from their house to the college they attended. 12 18 54 13 15 24 8 5 14 27 1 20 1. Using the data set above, find the percentile ranking for the data point 24. 2. Using the data set above, what dist...

A company is trying to show that their wages are fair. The mean salary is $45,000 but the median is $67,000. Which should they use for their position?

In a local marathon, Bob finished 60th out of 400 participants. What is his percentile ranking for this race?

Twelve college students were surveyed about the distance from their house to the college they attended. 12 18 54 13 15 24 8 5 14 27 1 20 1. Using the data set above, find the percentile ranking for the data point 24. (is this 75th percentile? 2. Using the...

Given the probability of rain on any given day in March is 1/5, find the probablity that: It rains on March 10 and 12, but not on March 11th. This is supposed to be used with multiplication Rule 1: P(A and B)= P(A)*P(B) cant figure it out, the answer is 4...

That is not one of the answers =(

400-60=340 340/400= 85th percentile?

choices: 1. 5000 2. 4750 3. 2500 4. 3400

yes, I got that answer, I figured out each using an area table 500-400=100 100/100=1 500-600=-100 -100/100=-1 on area table 1.00 = .341 .341+.341= .682 rounded =.68 .68*5000=3400

haha, beats me, but I would not want to work there!

Gotcha, that is what I put!! Can you help me with the other post? Its the only post that I am not confident about and it has not been answered. thank you!

1. Is this correct? 10/12=.83 =83rd percentile. 2. Is this correct? .58*12=6.9=7;7/12=58th percentile, 7th number = 15 15 corresponds to 58th percentile 3. Q1=10; Q2=14.5; Q3=22

well, the only way there can be 17 heads and 42 feet and 3 times more ducks, would be: 4 pigs (4 heads and 4 feet for each 4x4= 16 feet 13 ducks ( 13 heads and 2 feet each 13x2 =26 feet Heads = 4+13=17 for 4 pigs feet =16+26=42 for 13 ducks 4(Pigs) X 3 =...

Please see January 19th post, that noone answered...

P(A and B) = P(A) * P(B) 2/3 = rain 1/3 = no rain 2/3 * 1/3 = 2/9

I figured this out: 1/5 = rain 4/5= no rain 1/5*1/5*4/5 = 4/125