Question

In the past, the average age of employees of a mid-sized
corporation has been 35 years. Recently, the company has been
hiring older individuals. In order to determine whether there has
been an **increase** in the average age of all the
employees, a sample of 64 employees was selected. The average age
in the sample was 45 years with a standard deviation of 16 years.
Let *α* = .05.

13. State the null and the alternative hypotheses.

14. Compute the test statistic.

15. Using the *p*-value approach, test to determine
whether or not the mean age of all employees is significantly more
than 40 years.

Answer #1

In the past, the average age of employees of a mid-sized
corporation has been 35 years. Recently, the company has been
hiring older individuals. In order to determine whether there has
been an increase in the average age of all the employees, a sample
of 64 employees was selected. The average age in the sample was 45
years with a standard deviation of 16 years. Let α = .05.
13. State the null and the alternative hypotheses.
14. Compute the...

In the past, the average age of TXU employees has been 40 years.
Recently, TXU has been hiring older people. In order to determine
whether there has been an increase in the average age of all the
employees, a sample of 25 employees was selected. The sample
average age was 45 years with a standard deviation of 5 years.
Assume α = .05. What is the the p value for this test? What is the
critical value for this test?

In the past the average age of employees of a large corporation
has been 40 years. Recently, the company has been hiring older
individuals. In order to determine whether there has been an
increase in the average age of all the employees, a sample of 25
employees was selected. The average age in the sample was 42.5
years with a sample standard deviation of 5 years. Using a
significance level of α = .01, do the sample data provide support...

The mean age of the
patrons of a particular nightclub has historically been 35 years.
The proprietor of the nightclub wishes to find out if there is
evidence that the mean age of his patrons has increased. Let μ be
the mean age of the patrons of the nightclub.
Step 1: State the null
and alternative hypotheses.
Step 2: A random
sample of 41 recent evenings is selected. The average age of the
patrons in the sample is 36.4 years...

Recently, a local newspaper reported that part-time students are
older than full-time students. In order to test the validity of its
statement, two independent samples of students were
selected.
Full-Time
Part-Time
(in years)
26
24
S
2
3
N
42
31
a. Give the hypotheses for the above.
b. Compute the test statistic.
c. Using α = .05, test to determine whether or
not the average age of part-time students is significantly
more than full-time students.

The mean age of the patrons of a particular nightclub
has historically been 35 years. The proprietor of the nightclub
wishes to determine if the mean age of his patrons has changed. He
uses a sample of 36 recent evenings and finds that the average age
of the patrons in the sample is 36.8 years in the standard
deviation of 3. 6 years. Let u be the mean of the patrons of the
nightclub.
1) State the null and alternative...

12)A mid-sized company has decided to implement an enterprise
resource planning (ERP) system, and management suspects that many
of its employees are concerned about the planned implementation.
Managers are considering holding informational workshops to help
decrease anxiety levels among employees. To determine whether such
an approach would be effective, they randomly select 16 employees
to participate in a pilot workshop. These employees were
given a questionnaire to measure anxiety levels about ERP before
and after participating in the workshop. To determine...

Last year the average age of UH students was 21.3 years. This
semester, in order to meet the needs of older students, more
evening classes are scheduled. Has the average age of UH students
increased this semester? To answer this question, a random sample
of 64 students enrolled this semester was studied. The average age
of these students was x = 22.1 years and standard deviation s = 2.7
years. To test the hypothesis use 0.01 significance level.

The average age of a part-time seasonal employee at a hotel has
historically been years. This year the average age of a
randomly selected part-time seasonal employees at the
hotel is found to be with a standard devaition of . If
you want to test if this average decreased since last season, what
is the test statistic?
a.
b.
c. none of the others
d.
e.

Several years ago, the mean height of women 20 years of age or
older was 63.7 inches. Suppose that a random sample of 45 women who
are 20 years of age or older today results in a mean height of 64.2
inches.
(a) State the appropriate null and alternative hypotheses to
assess whether women are taller today.
(b) Suppose the P-value for this test is 0.11. Explain what
this value represents.
(c) Write a conclusion for this...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 7 minutes ago

asked 21 minutes ago

asked 27 minutes ago

asked 48 minutes ago

asked 53 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

asked 1 hour ago