In a recent year, the mean number of strokes per hole for a famous golfer was approximately 3.6. (a) Find the variance and standard deviation using the fact that the variance of a Poisson distribution is sigma squared equals mu. (b) How likely is this golfer to play an 18-hole round and have more than 72 strokes?

a.

Variance=σ²=3.6

Standard deviation=σ=1.897

b.

This golfer is not much likely to play an 18-hole round and have more than 72 strokes because probability is low i.e.16.88%.

Step-by-step explanation:

We are given that mean number of strokes per hole=μ=3.6.

a.

The mean and variance of the Poisson distribution are equal

μ=σ²

Variance=σ²=3.6.

Standard deviation=√variance

σ=√σ²

σ=√3.6

Standard deviation=σ=1.897

b.

P(X>72)=1-P(X≤72)

P(X>72)=1-P(X≤72)

The calculation for this probability are difficult to made by hand and so, excel is used for computation of this probability.

Also we are given the mean number of strokes per hole=μ=3.6 and we have to find the mean number of strokes per 18 hole for computing the probability.

1 hole=3.6

18 hole=3.6*18=64.8

The mean number of strokes per 18 hole=μ=64.8

Using excel function POISSON.DIST(72,64.8,TRUE) for calculating the above probability

P(X>72)=1-0.8312

P(X>72)=0.1688

This golfer is not much likely to play an 18-hole round and have more than 72 strokes because probability is low i.e.16.88%.

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0