Question

question 13 of 20
which of the following functions will correctly solve for the area under the curve in ( p(z > -0.21) )?
select the correct response:
normalcdf(-0.21, 9e99)
normalcdf(-0.21, 0)
normalcdf(-9e-99, 0.21)
normalcdf(0, -0.21)
normalcdf(-0.21, -9e-99)
my answer is not listed among the given choices.
normalcdf(-0.21, -9e99)
normalcdf(-9e99, -0.21)

Explanation:

Step1: Define the target area

We need $P(z > -0.21)$, which is the area under the standard normal curve to the right of $z=-0.21$.

Step2: Recall normalcdf syntax

For most calculators, normalcdf(lower bound, upper bound) computes the area between two z-scores.

Step3: Set bounds for the area

The lower bound is $z=-0.21$. The upper bound is a very large positive number (represented by 9E99, meaning $9 \times 10^{99}$) to approximate the right tail of the normal distribution.

Step4: Match to correct function

The function normalcdf (-0.21, 9E99) calculates the area from $z=-0.21$ to positive infinity, which equals $P(z > -0.21)$.

Answer:

normalcdf (-0.21, 9E99)