1 point) Let us suppose that a certain probability instructor manages, with probability 1, to write...
1 point) Let us suppose that a certain probability instructor manages, with probability 1, to write exams that have mean 75 and standard deviation 14 The instructor is teaching two classes, one of size 100 and the other of size 36, and is about to give an exam to both classes.
(a) Approximate the probability that the
average test score in the class of size 100 exceeds 80.
Probability ≈
(b) Repeat part (a) for the class of size
36.
Probability ≈
(c) Approximate the probability that the
average test score in the larger class exceeds that of the other by
more than 2.2 points.
Probability ≈
(d) Approximate the probability that the
average test score in the smaller class exceeds that in the other
by more than 2.2 points.
Probability ≈
Homework Answers
Add Answer to:
1 point) Let us suppose that a certain probability instructor
manages, with probability 1, to write...
Let us suppose that a certain probability instructor manages, with probability 1, to write exams that...
Let us suppose that a certain probability instructor manages, with probability 1, to write exams that have mean 6565 and standard deviation 1313. The instructor is teaching two classes, one of size 100 and the other of size 25, and is about to give an exam to both classes. (a) Approximate the probability that the average test score in the class of size 100 exceeds 70. Probability ≈≈ (b) Repeat part (a) for the class of size 25. Probability ≈≈...
Suppose that on a 100 point test, the professor's goal is for her students to have...
Suppose that on a 100 point test, the professor's goal is for her students to have an exam score variance of no more than 76 points. A recent sample of 18 exams has a sample standard deviation of 10.4. Test to see if the goal was achieved at an alpha level of 0.01. (Note: Please explain how you got your answer)
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
3) Suppose you are an educational researcher who wishes to examine the effect of a school...
3) Suppose you are an educational researcher who wishes to examine the effect of a school district's class size on its student achievement. Specifically, you are interested in whether in the U.S., on average, school districts with smaller class sizes perform differently on test scores than school districts with larger class sizes. To test this, you have conducted two surveys. The first survey randomly sampled 238 school districts with small class sizes. This survey found a sample average test score...
heres a better picture 132 /texttornework 2001) Draw the Distribution and mark off your ample means....
heres a better picture
132 /texttornework 2001) Draw the Distribution and mark off your ample means. Conspite the Test Statistic: Calculate the p value • Do you Reject the H or Fail to Reject the H.? • Write out a statement describing your conclustion. 2.2 Confidence Interval High school students who take the SAT mathematics exam a second time generally score higher than on their first attempt. The change in score has a Normal distribution with a standard deviation y...
Suppose your statistics instructor gave six examinations during the semester. You received the following exam scores...
Suppose your statistics instructor gave six examinations during the semester. You received the following exam scores (percent correct): 83, 76, 82, 84, 89, and 73. To compute your final course grade, the instructor decided to randomly select two exam scores, compute their mean, and use this score to determine your final course grade. Compute the population mean. This is your average grade based on all of your grades. (Round your answer to 2 decimal places.) Compute the population standard deviation....
Suppose your statistics instructor gave six examinations during the semester. You received the following exam scores...
Suppose your statistics instructor gave six examinations during the semester. You received the following exam scores (percent correct): 84, 70, 83, 86, 94, and 77. To compute your final course grade, the instructor decided to randomly select two exam scores, compute their mean, and use this score to determine your final course grade. Compute the population mean. This is your average grade based on all of your grades. (Round your answer to 2 decimal places.) Compute the population standard deviation....
I asked a question similar to this one, which was answered perfectly. Another practice problem is...
I asked a question similar to this one, which was answered perfectly. Another practice problem is now asking me to use two classes and get user input. For this Java program, you will write two classes: GradeCalculator and GradeCalculatorDriver In the GradeCalculator class, compute the final average and letter grade for a particular student. The final average is calculated according to the following rules: 1) There are ten exams scored out of 100 points 2) The lowest exam score is...
using if/switch statements (C++) Write a grading program for a class with the following grading policies:...
using if/switch statements (C++) Write a grading program for a class with the following grading policies: There are two quizzes, each graded on the basis of 10 points There is one midterm exam and one final exam, each graded on the basis of 100 points The final exam counts for 50% of the grade, the midterm counts for 25% and the two quizzes together count for a total of 25%. (Do not forget to normalize the quiz scores. They should...
Exercise 8-27 (LO8-3) Suppose your statistics instructor gave six examinations during the semester. You received the...
Exercise 8-27 (LO8-3) Suppose your statistics instructor gave six examinations during the semester. You received the following exam scores (percent correct): 83, 67, 90, 97, 91, and 70. To compute your final course grade, the instructor decided to randomly select two exam scores, compute their mean, and use this score to determine your final course grade. Compute the population mean. This is your average grade based on all of your grades. (Round your answer to 2 decimal places.) Compute the...
1) Answer the question True or False. 1) Nonparametric methods focus on the location of the probability distribution, rather than on specific parameters of the population. A) True B) False 2) Nonparametric tests are useful for qualitative data that can be ranked. A) True B) False 3) The sign test provides inferences about the population median rather than the population mean. A) True B) False 4) For a sign test to be valid, a large sample must be selected from...
3) Suppose you are an educational researcher who wishes to examine the effect of a school district's class size on its student achievement. Specifically, you are interested in whether in the U.S., on average, school districts with smaller class sizes perform differently on test scores than school districts with larger class sizes. To test this, you have conducted two surveys. The first survey randomly sampled 238 school districts with small class sizes. This survey found a sample average test score...
heres a better picture
132 /texttornework 2001) Draw the Distribution and mark off your ample means. Conspite the Test Statistic: Calculate the p value • Do you Reject the H or Fail to Reject the H.? • Write out a statement describing your conclustion. 2.2 Confidence Interval High school students who take the SAT mathematics exam a second time generally score higher than on their first attempt. The change in score has a Normal distribution with a standard deviation y...
Most questions answered within 3 hours.
-
Wildhorse Company follows the practice of pricing its inventory
at the lower-of-cost-or-market, on an individual-item
basis....
asked 26 minutes ago -
3. (10 pts) You grow a corn crop that yields 150 bushels ac-1,
with the following...
asked 15 minutes ago -
7. The term Six Sigma refers to:
Select one:
a. The control limits established in a...
asked 24 minutes ago -
For the following reaction: A(g) + 2 B(g) ⇌ 2 C(g) Calculate the
equilibrium constant K...
asked 26 minutes ago -
Which of the following best describes tidal volume? options:
1.The amount of oxygen in the air...
asked 43 minutes ago -
1. Smaller cost distortions occur when the traditional systems'
single indirect-cost rate and the activity-cost-driver rates:...
asked 51 minutes ago -
Using either a FMECA approach or some other appropriate RCA
tool, identify five risk treatment actions...
asked 51 minutes ago -
If for a test the P-value is between 0.0025 and 0.005, what
conclusion can you draw?...
asked 1 hour ago -
Using Python. Write a function clean2(aList) that takes a list
of integers aList as argument, and...
asked 1 hour ago -
Intrapreneurship is defined as the
development of an enterprise culture with an existing (Nandan,
2009). An...
asked 1 hour ago -
QUESTION 1 Tamiflu is a drug used to treat influenza. A study
found that Tamiflu reduced...
asked 1 hour ago -
Which of the following would be less likely to be used to
allocate factory overhead when...
asked 1 hour ago