The average thickness of books on a library shelf is 8.3 centimeters. The standard deviation is 0.6 centimeter. If 20% of the books are oversized, find the minimum thickness of the oversized books on the library shelf. Assume the variable is normally distributed.

8.8 cm

Step-by-step explanation:

-We know that the top 20% of the books are oversized.

-We therefore find the z-value of the top 20%:

#We substitute the z value in formula to solve X.

Where

-Given , the minimum thickness,X can be calculated as follows:

Hence, the minimum thickness of the oversized books is 8.8 cm

42

step-by-step explanation:

256/6=42

need more info

step-by-step explanation: