Question

a.) For a standard normal curve, find the area between z = 0.28 and z = 1.95. (Use 4 decimal places.)

b.) Find the positive *z* value such that 89% of the
standard normal curve lies between *–z* and *z*. (Use
2 decimal places.)

c.) Given a normal distribution with population standard
deviation of 21 and a mean of *μ* = 29. If a random sample
of size 62 is drawn, find *P*(29 ≤ *x* ≤ 31).

Round to three decimal places.

d.) If we want to estimate *p*, the population proportion
of likely voters who believe the state of the economy to be the
most urgent national concern, with 90% confidence and a margin of
error no greater than 2%, how many likely voters need to be
surveyed? Assume that you have no idea of the value of
*p*.

-1024

-1692

-4096

-6765

Answer #1

a.) Given a normal distribution with population standard
deviation of 21 and a mean of μ = 29. If a random sample
of size 62 is drawn, find P(29 ≤ x ≤ 31).
Round to three decimal places.
b.) Find the positive z value such that 89% of the
standard normal curve lies between –z and z. (Use
2 decimal places.)
c.) For a standard normal curve, find the area between
z = 0.28 and z = 1.95. (Use 4...

Find the area under the standard normal curve that lies between
the following two z values. Round your answers to at least four
decimal places.
(a)Find the area under the standard normal curve that lies
between = z − 1.28 and = z 1.36 .
(b)Find the area under the standard normal curve that lies
between = z − 2.17 and = z − 1.92 .
(c)Find the area under the standard normal curve that lies
between = z 1.36...

Find z such that 7.8% of the standard normal curve lies to the
left of z. z = ______. Find z such that 7.4% of the standard normal
curve lies to the right of z. z = ______. Find the z value such
that 81% of the standard normal curve lies between −z and z. (Round
your answer to two decimal places.) z = ______.

1)
a) Find the area under the Standard Normal Curve in-between z =
-0.59 and z = 2.86
Use the Normal table and give answer using 4 decimal places.
b) Find the area under the Standard Normal Curve in-between z =
-0.36 and z = 2.63
Use the Normal table and give answer using 4 decimal places.
c) Find P(z < 1.75)
Use the Normal table and give answer using 4 decimal places.

(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.

a. Find z such
that 24% of the standard normal curve lies to the right of z.
b. Find the z values such that 64% of the standard normal curve
lies between –z and z
c. Find z such that 36% of the standard normal curve lies to the
left of z

find the z value such that 39% of the standard normal curve lies
between -z and z.

1- Find the area under the standard normal curve between z=0.76
and z=1.90.
Round your answer to four decimal places.
2- Find the area under the standard normal curve between z=-2.49
and z=-0.44.
Round your answer to four decimal places.
3- Find the area under the standard normal curve between z=-2.26
and z=1.88.
Round your answer to four decimal places.
4- Find the area under the standard normal curve to the right of
z=2.37.
Round your answer to four decimal...

Find z such that 8.3% of the standard normal curve lies
to the right of z. (Round your answer to two decimal
places.)
z =

find the z value such that 87% of the standard normal curve lies
between -z ans z

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