Question

A two proportion z interval was constructed for the difference in the two population proportions, p1- p2. The resulting 99% confidence interval was (–0.004, 0.12). A conclusion that could be drawn is:

A: There is no significant difference between p1 and p2.

B: There is a significant difference between p1 and p2.

C: The range of possible differences between the two proportions could be from a 0.4% difference with p2 being larger up to a 12% difference with p1 being larger.

D: Both (a) and (c) are correct.

E: Both (b) and (c) are correct.

Answer #1

A two proportion z interval was constructed for the difference in the two population proportions, p1- p2. The resulting 99% confidence interval was (–0.004, 0.12).

If confidence interval contain 0. then we can say that there is no significant difference between two proportions.

Here confidence interval contains 0,

so we can conclude that there is no significant difference between p1 and p2.

A conclusion that could be drawn is:

**ANSWER:-**

**A: There is no significant difference between p1 and
p2.**

Construct the indicated confidence interval for the difference
between population proportions p1-p2 . Assume
that the samples are independent and that they have been randomly
selected.
x1 = 11, n1 = 45 and x2 = 18,
n2 = 54; Construct a 90% confidence interval for the
difference between population proportions p1 -
p2.
0.094 <p1 - p2 < 0.395
0.067 <p1 - p2 < 0.422
-0.238 <p1 - p2 < 0.060
0.422 <p1 - p2 < 0.065

Use the normal distribution to find a confidence interval for a
difference in proportions p1-p2 given the relevant sample results.
Assume the results come from random samples.
A 99% confidence interval for p1-p2 given that p-hat = 0.25 with
n1=40 and p2-hat = 0.35 with n2=100. Give the best estimate for
p1-p2 , the margin of error and the confidence interval. Round your
answer for the best estimate to two decimal places and round your
answers for the margin of...

Use the normal distribution to find a confidence
interval for a difference in proportions
p1-p2
given the relevant sample results. Assume the results
come from random samples.
A 99% confidence interval for
p1-p2
given that
p^1=0.76
with
n1=590
and
p^2=0.65
with
n2=340
Give the best estimate for
p1-p2
, the margin of error, and the confidence
interval.
Round your answer for the best estimate to two decimal
places and round your answers for the margin of error and the
confidence...

Calculate the estimate for the standard error of the difference
between two proportions for each of the following cases. Consider
that the standard error is to be used in confidence interval
calculation. (Give your answers correct to four decimal places.)
The proper TI-84 program to use for these calculations is
PRGM - STDERROR -1 PROPORTION
PRGM - STDERROR -2 MEANS
PRGM - STDERROR -2 PROP-HYP TST
PRGM - STDERROR -2 PROP-CNF INT
(a) n1 = 30, p1' = 0.8, n2...

Construct a confidence interval for p1 - p2 at the given level
of confidence.
x1 = 356, n1 = 543, x2 = 413, n2 = 589, 99% confidence
The researches are ___% confident the difference between the two
population proportions, p1 - p2, is between ____ and ____.

Construct a confidence interval for p1−p2 at the given level of
confidence. x1=35, n1=239, x2=33, n 2=297, 99% confidence The
researchers are ----------% confident the difference between the
two population proportions, p1−p2, is between ---------- and
------------

Construct a confidence interval for p1−p2 at the given level of
confidence.
x1=33, n1=241, x2=38, n2=294, 99% confidence
The researchers are __ % confident the difference between the
two population proportions, p1−p2, is between __ and ___.

Construct a confidence interval for p1 - p2 at the given level
of confidence.
x1 = 395, n1 = 537, x2 = 432, n2 = 552, 99% confidence.
The researchers are __% confident the difference between the two
population proportions, p1−p2, is between __ and __.
(Use ascending order. Type an integer or decimal rounded to
three decimal places as needed.)

Construct a confidence interval for p1 - p2 at the given level
of confidence.
x1 = 395, n1 = 537, x2 = 432, n2 = 552, 99% confidence.
The researchers are __% confident the difference between the two
population proportions, p1−p2, is between __ and __.
(Use ascending order. Type an integer or decimal rounded to
three decimal places as needed.)

Use the normal distribution to find a confidence interval for a
difference in proportions p1-p2 given the relevant sample results.
Assume the results come from random samples.
A 90% confidence interval for p1-p2 given thatp^1=0.25 with
n1=40 and p^2=0.35 with n2=120
Give the best estimate for p1-p2, the margin of error, and the
confidence interval.
Round your answer for the best estimate to two decimal places and
round your answers for the margin of error and the confidence
interval to...

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