Question

A poll of 2,061 randomly selected adults showed that 97% of them
own cell phones. The technology display below results from a test
of the claim that 94% of adults own cell phones. Use the normal
distribution as an approximation to the binomial distribution, and
assume a 0.01 significance level to complete parts (a) through (e).
Show your work. *****Correct answers are in BOLD (how do we
get those answers)**

Test of p=0.94 vs p≠0.94

X= 1989, N= 2061, Sample p=0.965066, 95% CI=(0.954648, 0.975483), z-value= 4.79, p-value= 0.000

a. Is the test two-tailed, left-tailed, or right-tailed?
**two-tailed**

b. What is the test statistic? (Round to two decimal places as
needed.) **4.79**

c. What is the P-value? (Round to three decimal places as
needed.) **0.000**

d. What is the null hypothesis and what do you conclude about
it? **H0:p=0.94**

Choose the correct answer below:

**a. Reject the null hypothesis because the P-value is
less than or equal to the significance level**

b. Reject the null hypothesis because the P-value is greater than the significance level

c. Fail to reject the null hypothesis because the P-value is less than or equal to the significance level

d. Fail to reject the null hypothesis because the P-value is greater than the significance level

What is the final conclusion?

a. There is not sufficient evidence to warrant rejection of the claim that 94% of adults own a cell phone.

**b. There is sufficient evidence to warrant rejection of
the claim that 94% of adults own a cell phone.**

c. There is sufficient evidence to support the claim that 94% of adults own a cell phone.

d. There is not sufficient evidence to support the claim that 94% of adults own a cell phone

Answer #1

A poll of 2,133 randomly selected adults showed that 94% of
them own cell phones. The technology display below results from a
test of the claim that 92% of adults own cell phones. Use the
normal distribution as an approximation to the binomial
distribution, and assume a 0.01
significance level to complete parts (a) through (e).
Test
of
pequals
0.92vs
pnot equals
0.92
Sample
X
N
Sample p
95% CI
Z-Value
P-Value
1
1996
2 comma 133
0.935771
(0.922098,0.949444
)...

A poll of
2 comma 1172,117
randomly selected adults showed that
9191%
of them own cell phones. The technology display below results
from a test of the claim that
9393%
of adults own cell phones. Use the normal distribution as an
approximation to the binomial distribution, and assume a
0.010.01
significance level to complete parts (a) through (e).
Test of
pequals=0.930.93
vs
pnot equals≠0.930.93
Sample
X
N
Sample p
95% CI
Z-Value
P-Value
1
19241924
2 comma 1172,117
0.9088330.908833
(0.8927190.892719,0.9249480.924948)...

A poll of 2,024 randomly selected adults showed that 94% of
them own cell phones. The technology display below results from a
test of the claim that 90% of adults own cell phones. Use the
normal distribution as an approximation to the binomial
distribution, and assume a 0.01
significance level to complete parts (a) through (e).
Test of
pequals=0.9 vs p≠0.9
Sample
X
N
Sample p
95% CI
Z-Value
P-Value
1
1904
2,024
0.940711
(0.927190,0.954233)
6.11
0.000
a. Is the...

a poll of 2039 randomly selected adults showed that
96% of them own cell phones. the technology display below results
from a test of a claim that 92% of adults own cell phones. use the
normal distribution as an approximation to the binomial
distribution, and assume a 0.01 significance level to complete
parts (a) through (e)
a) is the test two-tailed, left-tailed, or right-tailed
b) the test statistic is ( rounded two decimals)
c) the p- value ( rounded three...

A survey of 1,570 randomly selected adults showed that 541 of
them have heard of a new electronic reader. The accompanying
technology display results from a test of the claim that 34% of
adults have heard of the new electronic reader. Use the normal
distribution as an approximation to the binomial distribution, and
assume a 0.01 significance level to complete parts (a) through
(e).
a. Is the test two-tailed, left-tailed, or right-tailed?
Right tailed test
Left-tailed test
Two-tailed test
b....

A poll of 2 comma 047 randomly selected adults showed that 94%
of them own cell phones. The technology display below results from
a test of the claim that 95% of adults own cell phones. Use the
normal distribution as an approximation to the binomial
distribution, and assume a 0.01 significance level to complete
parts (a) through (e). Test of pequals0.95 vs pnot equals0.95
Sample X N Sample p 95% CI Z-Value P-Value 1 1933 2 comma 047
0.944309 (0.931253,0.957365)...

A poll of 2 comma 059 randomly selected adults showed that 93%
of them own cell phones. The technology display below results from
a test of the claim that 94% of adults own cell phones. Use the
normal distribution as an approximation to the binomial
distribution, and assume a 0.01 significance level to complete
parts (a) through (e). Test of pequals0.94 vs pnot equals0.94
Sample X N Sample p 95% CI Z-Value P-Value 1 1909 2 comma 059
0.927149 (0.912396,0.941902)...

A poll of 2 comma 085 randomly selected adults showed that 94%
of them own cell phones. The technology display below results from
a test of the claim that 91% of adults own cell phones. Use the
normal distribution as an approximation to the binomial
distribution, and assume a 0.05 significance level to complete
parts (a) through (e). Test of pequals0.91 vs pnot equals0.91
Sample X N Sample p 95% CI Z-Value P-Value 1 1957 2 comma 085
0.938609 (0.928306,0.948913)

In a recent poll of 745 randomly selected adults, 586 said that
it is morally wrong to not report all income on tax returns. Use a
0.01 significance level to test the claim that 75% of adults say
that it is morally wrong to not report all income on tax returns.
Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and
final conclusion that addresses the original claim. Use the
P-value method. Use the normal...

Assume that adults were randomly selected for a poll. They were
asked if they "favor or oppose using federal tax dollars to fund
medical research using stem cells obtained from human embryos." Of
those polled, 481 were in favor, 397 were opposed, and 120 were
unsure. A politician claims that people don't really understand
the stem cell issue and their responses to such questions are
random responses equivalent to a coin toss. Exclude the 120
subjects who said that they...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 15 minutes ago

asked 15 minutes ago

asked 21 minutes ago

asked 26 minutes ago

asked 31 minutes ago

asked 52 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago