Hello,

I have problems in writing a function in R for this particular question below.

Could you please help me in finding the solutions using R.

Thank you

The method of dichotomy (or method of division in halves) is a simple way for

numerically solving equations in a single unknown. Consider the equation f(x) = 0

with a continuous monotonic function f on the interval [a, b] which takes values

of dierent signs at the end points of the interval and which has a single root x*

within [a, b]. To nd the solution x* approximately, one divides [a; b] into halves

and calculates the value of f(x1) at the midpoint (a+b)/2 . If f(x1) not equal to 0, one takes

the two intervals [a, x1] and [x1,b] and from them selects for the next dichotomy

the one at the end points of which the values of the function dier in sign. This

continued division into halves gives a sequence x1, x2,..., which converges to the

root x* when the interval becomes very small.

Use the method of dichotomy to find the pth quantile of the standard normal

distribution (we assume that the function qnorm is not available). That is,

pnorm(x) = p

pnorm(x) - p = 0

f(x) = 0

Thanks in advance.