Question

A news poll found that

7272%

of people are concerned about the possibility that their personal records could be stolen over the Internet. If a random sample of

400400

college students at a certain university was taken and

304304

were concerned about the possibility that their personal records could be stolen over the Internet, could a researcher conclude at the

0.0250.025

level of significance that a higher proportion of the university's college students are concerned about Internet theft than the public at large?

Determine the null and alternative hypotheses. Select the correct choice below and fill in the answer boxes within your choice.

(Type integers or decimals.)

A.

Upper H 0H0:

pgreater than or equals≥nothing

Upper H Subscript Upper AHA:

pless than<nothing

B.

Upper H 0H0:

pequals=nothing

Upper H Subscript Upper AHA:

pnot equals≠nothing

C.

Upper H 0H0:

pless than or equals≤nothing

Upper H Subscript Upper AHA:

pgreater than>nothing

Check the requirement for a hypothesis test for a proportion.

In this situation,

npequals=nothing

is

▼

equal to

greater than

less than

5 and

n(1minus−p)equals=nothing

is

▼

less than

equal to

greater than

5. Thus, the requirement

▼

is not

is

satisfied.

(Type integers or decimals.)

What is the test statistic?

zequals=nothing

(Round to two decimal places as needed.)

What is the p-value?

p-valueequals=nothing

(Round to three decimal places as needed.)

What is the proper conclusion?

▼

Do not reject

Reject

Upper H 0H0.

There is

▼

sufficient

insufficient

evidence that a higher proportion of the university's college students are concerned about Internet theft than the public at large

Answer #1

Claim under test : a higher proportion of the university's college students are concerned about Internet theft than the public at large

Significance level :

point estimate of proportion:

Test statistic :

P value for right tailed test = 0.0374

Since the p value is greater than the significance level 0.025, we fail to reject the null hypothesis. We have no evidence to support the claim that a higher proportion of the university's college students are concerned about Internet theft than the public at large.

(a) Write the claim mathematically and identify
Upper H 0H0
and
Upper H Subscript aHa.
(b) Find the critical value(s) and identify the rejection
region(s). (c) Find the standardized test statistic. (d) Decide
whether to reject or fail to reject the null hypothesis.In a sample
of
10001000
home buyers, you find that
431431
home buyers found their real estate agent through a friend.
At
alphaαequals=0.020.02,
can you reject the claim that
4040%
of home buyers find their real estate agent...

One research study of illegal drug use among 12- to
17-year-olds reported a decrease in use (from 11.4% in 1997)
to
9.89.8%
now. Suppose a survey in a large high school reveals that, in a
random sample of
1 comma 0561,056
students,
9393
report using illegal drugs. Use a 0.05 significance level to
test the principal's claim that illegal drug use in her school is
below the current national average.
Formulate the null and alternative hypotheses. Choose the
correct answer...

A 2010 survey by a reputable automotive website found that
6868?%
of vehicle owners avoided automotive maintenance and repairs.
Suppose a company would like to perform a hypothesis test to
challenge this finding. From a random sample of
110110
vehicle? owners, it was found that
8484
avoid maintenance repairs. Using
alpha?equals=0.020.02?,
answer parts a and b below.
a. What conclusions can be drawn concerning the
proportion of vehicle owners who avoid automotive maintenance and?
repairs?
Determine the null and alternative...

In a study of cell phone usage and brain hemispheric dominance,
an Internet survey was e-mailed to
69726972
subjects randomly selected from an online group involved with
ears. There were
13481348
surveys returned. Use a 0.01 significance level to test the
claim that the return rate is less than 20%. Use the P-value
method and use the normal distribution as an approximation to the
binomial distribution.
Identify the null hypothesis and alternative hypothesis.
A.
Upper H 0H0:
pless than<0.2
Upper...

An annual survey of first-year college students asks 273 comma
000 students about their attitudes on a variety of subjects.
According to a recent survey, 57% of first-year students believe
that abortion should be legal. Use a 0.05 significance level to
test the claim that over half of all first-year students believe
that abortion should be legal. Formulate the null and alternative
hypotheses. Choose the correct answer below. A. Upper H 0:
pequals0.5 Upper H Subscript a: pgreater than0.5 B....

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,
485485
were in favor,
396396
were opposed, and
122122
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
122122
subjects who said that they...

State
Upper H 0H0
and
Upper H Subscript aHa
in words and in symbols. Then determine whether the hypothesis
test is left-tailed, right-tailed, or two-tailed. Explain your
reasoning. Sketch a normal sampling distribution and shade the area
for the P-value.A report claims that lung cancer accounts
fornothing
3333%
of all cancer diagnoses.
State the null hypothesis in words and in symbols.
The null hypothesis expressed in words is the proportion of
cancer diagnoses attributable to lung cancer
▼
is at...

An online poll asked: "Do you believe the Loch Ness monster
exists?" Among
21 comma 01921,019
responses,
6161%
were "yes." Use a
0.010.01
significance level to test the claim that most people believe
that the Loch Ness monster exists. How is the conclusion affected
by the fact that Internet users who saw the question could decide
whether to respond?
Identify the null and alternative hypotheses for this test.
Choose the correct answer below.
A.
Upper H 0H0:
pequals=0.50.5
Upper H...

A company is criticized because only 15 of 41 people in
executive-level positions are women. The company explains that
although this proportion is lower than it might wish, it's not
surprising given that only 44% of their employees are women. The
company has more than 500 executives worldwide. What do you think?
Test an appropriate hypothesis with alpha equals 0.05 and state
your conclusion. Be sure the appropriate assumptions and conditions
are satisfied before you proceed. Determine the hypotheses for...

Settings
Accessibility
+
On-Screen Keyboard
+
About
+
An energy company wants to choose between two regions in a state
to install energy-producing wind turbines. A researcher claims that
the wind speed in Region A is less than the wind speed in Region B.
To test the regions, the average wind speed is calculated for
6060
days in each region. The mean wind speed in Region A is
13.713.7
miles per hour. Assume the population standard deviation is
2.82.8
miles...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 8 minutes ago

asked 12 minutes ago

asked 34 minutes ago

asked 36 minutes ago

asked 42 minutes ago

asked 42 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago