Suppose the monthly charge for cell phone plans is normally distributed with mea

Question

Suppose the monthly charge for cell phone plans is normally distributed with mean mu = 558 and standard deviation sigma = 540 Draw a normal cure with the parameters labeled. The region that represents the proportion of plane that charges less than $43 Suppose the area under the normal curve is the x = $43 is Provide an of this result. Choose the correct graph of line normal curve below Choose the graph that show the corrected shaded region Choose the correct below 15.87% at cell phone plans cost less than $43 per month The probability is 0.1687 a randomly selected cell phones plan is more than $43 per month 15.87% of cell phone plans cost more than $43 per month 84.13% of cell phone plans cost than $43 per month.

Explanation / Answer

a) As mean=58 and standard dev=15, The lines should be at (58-15),58,(58+15) =43,58,73-------->Option C)

b)The region below $43 needs to be shaded---------->Option B)

c)15.87% of the cell phone plan cost less than $43 ----------->Option A)

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