Posted by **Jay** on Sunday, April 17, 2011 at 11:09pm.

Can someone help me verify if this is correct?

Gasoline usage for compact cars in Canada is a normal distribution with a mean of 33.3 km/l and with standard deviation of 7.3 km/L. Round your answers to one decimal place.

a) What percentage of compact cars obtains 20km/L or LESS?

z= x-mean/standard deviation

= 20-33.3/7.3

= 1.82 Km/L

(find percent through z-score table)

which becomes 0.0344 x 100

= 3.4 %

b) What percentage of compact cars obtains MORE than 40 km/L

z=40-33.3/7.3

= 0.92 km/L = 0.8212

= 1 - 0.8212

= 0.1788 x 100

= 17.9%

Question is, for question b, is it 1-0.8212 or 100-0.8212?

## Answer This Question

## Related Questions

- Math - Can someone help me verify if this is correct? Gasoline usage for compact...
- math - Studies shown that gasoline use or compact cars sold in the U.S. is ...
- math please help - Studies shown that gasoline use or compact cars sold in the U...
- MATH - Which of the following normal distributions has the smallest spread? A. A...
- Math (Statistic) - Considered the sampling distribution of a sample mean ...
- Math - Can someone explain what to do for the following question. What ...
- stats - (a) The test had six multiple-choice items that were scored as correct ...
- stats - (a) The test had six multiple-choice items that were scored as correct ...
- stats - Suppose the mass of college students can be modeled by the normal ...
- Math - I have a problem on standard deviation, and I will need some help with it...

More Related Questions