Question

About _______% of the area under the curve of the standard normal distribution is outside the interval z=[−2.23,2.23] (or beyond 2.23 standard deviations of the mean).

please explain how to solve using ti84

Answer #1

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answer in case the answer has helped you**

P(z > 2.23 or z<-2.23)

= 1- P(-2.23<Z<2.23)

= 1- (0.987126279 - 0.012873721)

= 1- 0.9743

**= .0257**

To do the same in ti84, follow these steps:

Two Tailed (non-directional) z-test:

1) Calculate z_calc (z_test)

2) Find the absolute value of z_calc ( in our case 2.23 and -2.23)

3) 2nd DISTR

4) Scroll down to normalcdf()

5) ENTER

6) Now enter: |z_calc|, 1000, 0,1)

7) ENTER

8) Output is ½ of the P-value

9) So, Multiply result by 2

10) subtract this value from 1 to get your answer.

About % of the area under the curve of the standard normal
distribution is outside the interval Z = (-0.77,0.77) (or beyond
0.77 standard deviations of the mean). Please show your answer to 2
decimal places show on how to imnput on graphing calculator

1. About ____ % of the area under the curve of the standard
normal distribution is between z = − 1.863 z = - 1.863 and z =
1.863 z = 1.863 (or within 1.863 standard deviations of the
mean).
2. About ____ % of the area under the curve of the standard
normal distribution is outside the interval
z=[−2.24,2.24]z=[-2.24,2.24] (or beyond 2.24 standard deviations of
the mean).
3. About ____ % of the area under the curve of the...

A) About _____% of the area under the curve of the standard
normal distribution is outside the interval
z=[−2.08,2.08]z=[-2.08,2.08] (or beyond 2.08 standard deviations of
the mean).
B) Assume that the readings at freezing on a batch of
thermometers are normally distributed with a mean of 0°C and a
standard deviation of 1.00°C. A single thermometer is randomly
selected and tested. Find the probability of obtaining a reading
less than -0.491°C.
P(Z<−0.491)=P(Z<-0.491)=
C) In a recent year, the Better Business...

(a)Find the area under the standard normal curve that lies
outside the interval between =z−1.73 and =z1.99.
(b)Find the area under the standard normal curve that lies
outside the interval between =z−1.75 and =z0.99.
(c)Find the area under the standard normal curve that lies
outside the interval between =z0.89 and =z1.41.
(d)Find the area under the standard normal curve that lies
outside the interval between =z−1.80 and =z−1.33.

In Exercises 16 and 17, find the indicated area under the curve
of the standard normal distribution, then convert it to a
percentage and fill in the blank.
16. About _______% of the area is between z = -0.75 and z = 0.75
(or within 0.75 standard deviations of the mean).
17. About _______% of the area is between z = -1.5 and z = 1.5
(or within 1.5 standard deviations of the mean).

Find the indicated area under the curve of the standard normal
distribution; then convert it to a percentage and fill in the
blank.
About ______% of the area is between
zequals=minus−3.5
and
zequals=3.5
(or within 3.5 standard deviations of the mean).
About
nothing%
of the area is between
zequals=minus−3.5
and
zequals=3.5
(or within 3.5 standard deviations of the mean).

Using the standard normal distribution determine:
a) The area under the curve to the left of z=-2.38
b) The area under the curve to the right of z=1.17
c) The area under the curve between z=-1.52 and z=2.04

1. For a standard normal distribution, given:
P(z < c) = 0.7232
Find c. (WHERE is this on the z score table and can I figure in
excel/sheets?)
2. For a standard normal distribution, find:
P(z > c) = 0.0912
Find c.
3. About___ % of the area under the curve of the standard normal
distribution is between z=−2.837z=-2.837 and z=2.837z=2.837 (or
within 2.837 standard deviations of the mean). (HOW- preferably
through technology/excel/sheets)
4. About___ % of the area under...

Find the percentage of the area under a normal curve between the
mean and the given number of standard deviations from the mean. -
0.43
Can you explain how to get the z-score?

For the problems below, find the area under the standard normal
distribution curve.
a) P (−.21 < z < .21)
b) P (.03 < z < .175)
c) P (z > −.39)
d) P (z > .49)
e) P (z < 3.13)
f) P (z < −2.91)
g) P (.08 < z < 1.87)
h) P (−1.73 < z < .02)
please show step by step solution along with the bell curve.
please solve for problems a-h
Thanks

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