Question
In: Statistics and Probability
Suppose that salaries of recent graduates from a large state university are normally distributed with mean...
Suppose that salaries of recent graduates from a large state university are normally distributed with mean $45,000 and standard deviation $4,200. (1) What proportion of salaries are between $40,000 and $55,000? (2) What two salaries bound the middle 40%?
Solutions
orchestra answered 2 years agoRelated Solutions
A university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates...
A university surveyed recent graduates of the English
Department for their starting salaries. Four hundred graduates
returned the survey. The average salary was $25,000. The population
standard deviation was $2,500. What is the 90% confidence interval
for the mean salary of all graduates from the English
Department?
A) [$24,794, $25,206]
B) [$24,988, $25,012]
C) [$22,500, $27,500]
D) [$24,755, $25,245]
A university surveyed recent graduates of the English department for their starting salaries. Three hundred graduates...
A university surveyed recent graduates of the English department
for their starting salaries. Three hundred graduates returned the
survey. The average salary was $25,000. The sample standard
deviation was $1,500. What is the 95% confidence interval for the
mean salary of all graduates from the English department?
Salaries for new assistant professors at State College are normally distributed with a mean of $80000 ...
Salaries for new assistant professors at State College are
normally distributed with a mean of $80000
and a standard deviation of $9000 . We randomly survey
20 teachers from that district, let
X be the salary of a randomly selected
teacher at State, and let X¯ be the average
salary of 20 randomly selected
teachers.
(2%) X∼ (pick one)
BinomialNormalPoissonUniform ( , ) .
(3%) X¯∼ (pick one)
BinomialNormalUniformPoisson ( , ) .
(3%) Find the probability that an individual teacher earns...
Salaries for new assistant professors at State College are normally distributed with a mean of $50000...
Salaries for new assistant professors at State College are
normally distributed with a mean of $50000 and a standard deviation
of $6000 . We randomly survey 10 teachers from that district, let X
be the salary of a randomly selected teacher at State, and let X¯
be the average salary of 10 randomly selected teachers.
(2%) X∼ (
,
) .
(3%) X¯∼ (
,
) .
(3%) Find the probability that an individual teacher earns more
than $65,000.
P(X>65000)=...
Assume that 40% of graduates come from University A and and earn salaries of 30,000 on...
Assume that 40% of graduates come from University A and and earn
salaries of 30,000 on average with a standard deviation of 5,000.
The remainder come from University B and earn salaries of 25,000 on
average with a standard deviation of 7,500. If you are told that a
graduate is earning less than 35,000, what is the probability that
they came from University A? (Assume salaries are normally
distributed.)
The starting salaries of individuals with an MBA degree are normally distributed with a mean of...
The starting salaries of individuals with an MBA degree are
normally distributed with a mean of $90,000 and a standard
deviation of $20,000. Suppose we randomly select 16 of these
individuals with an MBA degree. What is the standard deviation of
the average starting salary for these
individuals?
a.
$4,000
b.
$5,000
c.
$20,000
d.
$1,666.67
The starting salaries of individuals with an MBA degree are normally distributed with a mean of...
The starting salaries of individuals with an MBA degree are
normally distributed with a mean of $90,000 and a standard
deviation of $20,000. Suppose we randomly select 16 of these
individuals with an MBA degree. What is the probability that the
average starting salary for these individuals is
at least $85,800?
0.7995
0.9131
0.2005
-0.2611
The annual salary of fresh college graduates is thought to be normally distributed with a mean...
The annual salary of fresh college graduates is thought to be
normally distributed with a mean of $45,000 and standard deviation
of $8000. Do the following.
(a) What is the z −score of the salary of $55,000? (10 points)
(b)
If you randomly select such a graduate, what is the probability
that he/she will be earning a salary of $55,000 or less? (Use z
−score and Excel function to calculate this) (10 points)
(c) If you randomly select such a...
Salaries for teachers in a particular elementary school district are normally distributed with a mean of...
Salaries for teachers in a particular elementary school district
are normally distributed with a mean of $44,000 and a
standard deviation of $6,500. We randomly survey ten teachers from
that district.
1.Find the probability that the teachers earn a total of over
$400,000
2.If we surveyed 70 teachers instead of ten, graphically, how
would that change the distribution in part d?
3.If each of the 70 teachers received a $3,000 raise,
graphically, how would that change the distribution in part...
Salaries for teachers in a particular elementary school district are normally distributed with a mean of...
Salaries for teachers in a particular elementary school district
are normally distributed with a mean of $44,000 and a standard
deviation of $6,500. We randomly survey ten teachers from that
district. Find the 85th percentile for the sum of the sampled
teacher's salaries to 2 decimal places.
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Draw a DFA for the following ( ∑ = {0,1}): Set of all strings with.
- In the article from Forbes notes that the goal of a leader is not to clone...
- Many people keep time using a 24 hour clock (11 is 11am and 23 is 11pm,...
- UNIX ONLY -- DIFFICULT LAB ASSIGNMENT This is an extremely difficult subject for me. Could you...
- Do you know why your credit card can be refused even though you are profitable?
- The Following Java expression: S/10 * 10 + 10 – S = C Show that this...
- Year Cash Flow 0 −$9,700 1 5,800 2 2,500 3 3,400 &nb
ADVERTISEMENT