Martian potatoes begin to sprout very quickly after planting. Suppose X is the number of days after planting until a Martian potato sprouts. Then X has the following probability density function: f(x)= 3e-* + e-x/2 +e-x/4 for 0sxso and 0 otherwise 14 14

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter1: Functions
Section1.2: Functions Given By Tables
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g) What is the standard deviation of X? 

h) What is the probability that X is more than 2 standard deviations above its expected value

i) What is the expected value of X4

Martian potatoes begin to sprout very quickly after planting. Suppose X is the number of days after planting until a Martian potato
sprouts. Then X has the following probability density function: f(x)= 3e-* + e-x/2 +e-x/4 for 0sxso and 0 otherwise
14
14
Transcribed Image Text:Martian potatoes begin to sprout very quickly after planting. Suppose X is the number of days after planting until a Martian potato sprouts. Then X has the following probability density function: f(x)= 3e-* + e-x/2 +e-x/4 for 0sxso and 0 otherwise 14 14
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