c. Let us assume that x has a distribution that is approximately normal. What is the probability that x is between $12 and $18

0.0066

Step-by-step explanation:

The x has a distribution that is approximately normal. For normal distribution the probability of x will be,

u = 12 and 18

P (12 18)

P (- 2.3   2.85 )

P (0.9912 - 0.9978)

= 0.0066

f(x) is the value of the function. b is the value of the function when x equals zero or the y-coordinate of the point where the line crosses the y-axis in the coordinate plane.

step-by-step explanation:

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