Friday

March 27, 2015

March 27, 2015

Posted by **Jay** on Sunday, April 17, 2011 at 12:36pm.

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?

- Math -
**Jay**, Sunday, April 17, 2011 at 11:08pmanyone?

**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 - 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...

statistics - The manufacturer of a new compact car claims the miles per gallon (...

Statistics - The manufacturer of a new compact car claims the miles per gallon (...