Question

Your statistics class will have two midterm exams and a final exam at the end of the term. The scores you earn on the three exams will:

a) be independent of one another because the outcome on one exam is related to the outcome on the other exams.

b) be independent of one another because the outcome on one exam is not related to the outcome on any of the other exams.

c) not be independent of one another because the outcome on one exam is not related to the outcome on any of the other exams.

d) not be independent of one another because the outcome on one exam is related to the outcome on the other exams.

Answer #1

Your statistics class will have two midterm exams and a final exam at the end of the term.

The performance of the student in the two exams will be independent of each other since the outcome of one exam will not effect the outcome of other exams

For example if the performance in midterm exam is poor due to the difficulty level of the exam being high or any other factor, and the performace in final exams was very good due to the difficulty level of the exam being low or any other factor, the outcome of the mid term is not effecting the outcome of the final exams

So the midterm exams and final exams will be independent of one another because the outcome on one exam is not related to the outcome on any of the other exams.

So Answer is B

Scores on Professor Combs' Statistics Final Exams have a long
term history of being normally distributed, with a mean of μμ = 72
and a standard deviation of σσ = 9
a.) Find the probability that a single student
will score above a 77 on the Final exam.
b.) Find the probability that a single student
will score between a 67 and 77 on the Final exam.
c.) Find the probability that an entire class of
20 students will have...

Suppose that your statistics professor tells you that the scores
on a midterm exam were approximately normally distributed with a
mean of 78 and a standard deviation of 7. The top 15% of all scores
have been designated A’s. What is the minimum score that you must
earn in order to receive a letter grade A.

The professor of a Statistics class has stated that,
historically, the distribution of final exam grades in the course
resemble a Normal distribution with a mean final exam mark of
μ=60μ=60% and a standard deviation of σ=9σ=9%.
(a) What is the probability that a random chosen
final exam mark in this course will be at least 73%? Answer to four
decimals.
equation editor
(b) In order to pass this course, a student must
have a final exam mark of at...

A professor knows that her statistics students' final exam
scores have a mean of 78 and a standard deviation of 9.3. In his
class, an "A" is any exam score of 90 or higher. This quarter she
has 25 students in her class. What is the probability that 4
students or more will score an "A" on the final exam?

A
statistics teacher believes that the final exam grades for her
class have a normal distribution with a mean of 80 and a standard
deviation of 8. Answer the following:
(a)
Determine the z-score for a person from
this population that has a test score of 66. Then find the
z-score for someone whose test score is
95.
(b)
If
x represents a possible test score from this population,
find P(x > 87).
(c)
Find P(79
< x < 89)...

Are the means for the final exams the same for all statistics
class delivery types? The table below shows the scores on final
exams from several randomly selected classes that used the
different delivery types.
Online
Hybrid
Face-to-Face
72
84
80
83
73
79
76
85
85
81
82
80
82
86
79
81
Assume that all distributions are normal, the three population
standard deviations are approximately the same, and the data were
collected independently and randomly. Use a level...

Use the following information for Questions 28-32. Final grades
in a class are a weighted average of the midterm (25%) and final
(75%) exams: G = 0.25M + 0.75F. Each exam has 100 possible points.
Suppose the average and standard deviation of scores on the midterm
were 71 and 19 respectively, while the values for the final exam
were 69 and 23. Suppose further that the correlation coefficient
between the two exams is 0.50.
1. What is the mean of...

Two of your friends each received the results of their first
midterm exam this term. Jack's score on the Spanish exam was 22.5
points (out of 25 points possible). The distribution of Spanish
exam scores was normal (bell-shaped) with an average score of 20
points (out of 25 points possible) and a standard deviation of 2
points. Jill's score on the math exam was 72 points (out of 80
points possible). The distribution of math exam scores was uniform
over...

A large statistics class consists of 250 students. On the final
exam, the professor worries that question 13 might be unfair. He
resolves to drop question 13 if less than 40% of the class
correctly answers the question. After grading 125 randomly selected
final exams (out of 250 taken), a student calls the professor and
asks if question 13 will be dropped. The professor looks at the
graded exams and notes that 46 of the 125 graded exams got question...

Suppose that you are taking a course.
There are two midterms and a final exam. Each midterm impacts 25%
of the course grade while final exam impacts 50% of the grade. The
first and second midterm scores follow a normal distribution with
mean 84 points and the standard deviation of 9 points and mean 85
points and the standard deviation of 6. Assume that the final exam
is also normally distributed with mean 87 and standard deviation of
6 points....

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 13 minutes ago

asked 20 minutes ago

asked 47 minutes ago

asked 57 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

asked 2 hours ago