Screen Shot 2023-07-09 at 6.41.06 PM

.png
3. (7 points) According to Information Please Alimanac, 80% of adult smokers started smoking before they were 18 years old. Suppose 100 adult smokers are randomly selected. a. Whatis the shape of the Tlstrlbutlon of the binomial probability distribution? np(1-pJ - ." ? ' / " A ",I' (':'0 ' :_—. " | "'/- - ' 'o "I v OO{ U ST U B S0l oy { 0] A\ " ' & ' SO o= —'3[/ b. Find the mean and standard deviation. __ ~ o5 " ) -:}' - J u = 'r'i P' - v \l—' ) ! o P f l | " A r\' I"(' L'.? J' _(:\ ' R Use the normal approximation to the binomial to approximate the probability that at least 80 of them i started smoking before they were 18 years old. Round answer to the nearest thousandth - '/'?7 4. (5 points) Draw a normal curve with pxgggand 2y210. Label the mean and the inflection points Shade in the area to the right of @@#25. Find this area to the nearest thousandth and give two interpretations of this area. qorm = .67 () The p-opor Non ofF 4 sl oy e /" —rg F{'h @C« o;