4- Determine the area under the standard normal curve that lies between

(a) Z=0.35 and Z=0.35,

(b) Z=0.96 and Z=0,

(c) Z=0.16 and Z=0.01.

5- The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.3

miles per gallon.

(a) What proportion of hybrids gets over 62 miles per gallon?

(b) What proportion of hybrids gets 53 miles per gallon or less?

(c)What proportion of hybrids gets between 59 and 62

miles per gallon?

(d) What is the probability that a randomly selected hybrid gets less than 46 miles per gallon?

6- Question content area top

Part 1

Assume the random variable X is normally distributed with mean =50 and standard deviation =7. Compute the probability. Be sure to draw a normal curve with the area corresponding to the probability shaded.

Upper P (Upper X greater than 42)