Question
In: Statistics and Probability
An accounting professor is notorious for being stingy in giving out good letter grades. In a...
An accounting professor is notorious for being stingy in giving
out good letter grades. In a large section of 170 students in the
fall semester, she gave out only 2% A's, 18% B's, 35% C's, and 45%
D's and F's. Assuming that this was a representative class, compute
the 85% confidence interval of the probability of getting at least
a B from this professor. (You may find it useful to
reference the z table. Round intermediate calculations to at least
4 decimal places. Round "z" value and final answers to 3
decimal places.)
Solutions
Expert Solution
Solution :
Given that,
Point estimate = sample proportion = 
= 0.18
Z
/2
= 1.44
Margin of error = E = Z
/ 2 * 
* (1 -
)) / n)
= 1.44 * (
= 0.042
A 85% confidence interval for population proportion p is ,
- E < p <
+ E
0.18 - 0.042 < p < 0.18 + 0.042
0.138 < p < 0.222
(0.138 , 0.222)
orchestra answered 1 year agoRelated Solutions
I need a good sample of supervisor’s-evaluation letter for accounting intern to university professor which will...
I need a good sample of supervisor’s-evaluation letter for
accounting intern to university professor which will include 1) the
intern's strengths and weaknesses 2) the overall-performance of
intern like very satisfied, not satisfied and etc. Thank you
An art history professor assigns letter grades on a test according to the following scheme. A:...
An art history
professor assigns letter grades on a test according to the
following scheme.
A: Top 13%13% of
scores
B: Scores below the
top 13%13% and above the bottom 56%56%
C: Scores below the
top 44%44% and above the bottom 21%21%
D: Scores below the
top 79%79% and above the bottom 9%9%
F: Bottom 9%9% of
scores
Scores on the test are
normally distributed with a mean of 79.779.7 and a standard
deviation of 8.48.4.
An English professor assigns letter grades on a test according to the following scheme. A: Top...
An English professor assigns letter grades on a test according
to the following scheme.
A: Top 13%of scores
B: Scores below the top
13% and above the bottom 61%61%6
C: Scores below the top 39% and above the bottom 22%
D: Scores below the top 78% and above the bottom 6%
F: Bottom 6% of scores
Scores on the test are normally distributed with a mean of 75.1
and a standard deviation of 9.1. Find the numerical limits for a...
A humanities professor assigns letter grades on a test according to the following scheme. A: Top...
A humanities professor assigns letter grades on a test according
to the following scheme.
A: Top 8% of scores
B: Scores below the top 8% and above the bottom 58%
C: Scores below the top 42% and above the bottom 22%
D: Scores below the top 78% and above the bottom 7%
F: Bottom 7% of scores
Scores on the test are normally distributed with a mean of 77.1
and a standard deviation of 7.4.
Find the minimum score required...
An English professor assigns letter grades on a test according to the following scheme. A: Top...
An English professor assigns letter grades on a test according
to the following scheme.
A: Top 15% of scores
B: Scores below the top 15% and above the bottom 64%
C: Scores below the top 36% and above the bottom 21%
D: Scores below the top 79% and above the bottom 8%
F: Bottom 8% of scores
Scores on the test are normally distributed with a mean of 76.5
and a standard deviation of 8.4. Find the numerical limits for...
An English professor assigns letter grades on a test according to the following scheme. A: Top...
An English professor assigns letter grades on a test according
to the following scheme.
A: Top 14%14% of scores
B: Scores below the top 14%14% and above the bottom 57%57%
C: Scores below the top 43%43% and above the bottom 24%24%
D: Scores below the top 76%76% and above the bottom 8%8%
F: Bottom 8%8% of scores
Scores on the test are normally distributed with a mean of
69.669.6 and a standard deviation of 99. Find the numerical limits
for...
An English professor assigns letter grades on a test according to the following scheme. A: Top...
An English professor
assigns letter grades on a test according to the following
scheme.
A: Top 9% of
scores
B: Scores below the
top 9% and above the bottom 63%
C: Scores below the
top 37% and above the bottom 22%
D: Scores below the
top 78% and above the bottom 6%
F: Bottom 6% of
scores
Scores on the test are
normally distributed with a mean of 66.9 and a standard deviation
of 9.2. Find the numerical limits for...
Create an Java application that uses a class to convert number grades to letter grades and...
Create an Java application that uses a class to convert number
grades to letter grades and another class for data validation.
Specifications
The Grade class should have only one Instance Variable of type
int.
Use a class named Grade to store the data for each grade. This
class should include these three methods:
public void setNumber(int number)
public int getNumber()
public String getLetter()
The Grade class should have two constructors. The first one
should accept no parameters and set the...
A professor is studying to see if there is a relationship between the grades and gender...
A professor is studying to see if there is a relationship
between the grades and gender of his students. He picks a random
sample of his students and notes their grades (A, B, or C) and
their gender (male or female). He finds that:
28% are A students.
58% are B students.
62% of his students are female.
Of those who are female, one-third are A students.
Of those who are B students, three-fifths are female
students.
What percentage of...
A professor is studying to see if there is a relationship between the grades and gender...
A professor is studying to see if there is a relationship
between the grades and gender of his students. He picks a random
sample of his students and notes their grades (A, B, or C) and
their gender (male or female). He finds that:
28% are A students.
58% are B students.
62% of his students are female.
Of those who are female, one-third are A students.
Of those who are B students, three-fifths are female
students.
What percentage of...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 1.Prove that{2k+1:k∈N}∩{2k2 :k∈N}=∅. 2.Give two examples of ordered sets where the meaning of ” ≤ ”...
- “The Internet a typhoon force, a ten times force, or is it a bit of wind?...
- 2. TurboCard credit card company offers a loyalty program to its credit card users whereby the...
- Henrietta is self-employed and would like to know what kind of deduction she could get for...
- Workplace deviant behavior varies from negative to positive, whenever employees threaten the well-being of an organization, ...
- Describe an action a regulatory agency took against a business in the past 6 months. Post...
- This is all in Python. Also, the names come from a .txt file that i have...
ADVERTISEMENT