7. (4 pts) Sherry took the Aims test in third grade and scored in the 80th...
7. (4 pts) Sherry took the Aims test in third grade and scored in the 80th percentile on the math portion. Explain what this percentile means.
Homework Answers
The percentile means that Sherry has scored better than 80% of the students in math portion of Aims test.
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7. (4 pts) Sherry took the Aims test in third grade and
scored in the 80th...
4) In the 2014–2015 academic year, 1,108,165 high school seniors took the SAT. That year the...
4) In the 2014–2015 academic year, 1,108,165 high school seniors took the SAT. That year the mean of the scores from the math portion was 501 with a standard deviation of 117. What percentage scored between 600 and 700 points? Round to the second decimal place (0.12). 5) In the 2014–2015 academic year, 1,108,165 high school seniors took the SAT. That year the mean of the scores from the math portion was 501 with a standard deviation of 117. If...
A sample of 50 third-grade students had a average of 78 on a math proficiency test,...
A sample of 50 third-grade students had a average of 78 on a math proficiency test, with a sample standard deviation of 12. Is there enough evidence to conclude that the third-grade sample mean is different from the third-grade population mean of 67? Assume a 0.02 significance level. Use the Critical Value Method of Testing (this means NO P-Values!). In your work space below, you will need to have - 1. The null hypothesis, Ho 2. The alternative hypothesis, H1...
0/2 pts Question 3 On a certain standardized test . The mean is 54 .The standard deviation is 10 .Scores are whole numbers . Connie scored 34 Find numbers a and c such that Connie scored higher than...
0/2 pts Question 3 On a certain standardized test . The mean is 54 .The standard deviation is 10 .Scores are whole numbers . Connie scored 34 Find numbers a and c such that Connie scored higher than approximately 100-d' (a) percent of people who took the test. Make a continuity correction. What is 100c a? Correct Answer 101.95
0/2 pts Question 3 On a certain standardized test . The mean is 54 .The standard deviation is 10 .Scores are...
1. On a national standardized test Jimmy gets results that say he scored in the 95th...
1. On a national standardized test Jimmy gets results that say he scored in the 95th percentile. This means (a) Jimmy got 95% of the questions correct on the test. (b) Jimmy's score was two standard deviations above the mean. (c) Of the students that took the exam, 95% scored the same or lower than Jimmy. (d) Of the students that took the exam, 5% scored the same or lower than Jimmy. 2. A high school offers three foreign language...
THINKING/COMMUNICATION 7. A post-secondary class has 600 students. The mean grade on their midterm exam is...
THINKING/COMMUNICATION 7. A post-secondary class has 600 students. The mean grade on their midterm exam is 70%, with a standard deviation of 15. a. Find the Z-score of a student who scored 80% on his exam. [2 marks] b. Find the percentage of students who failed the exam. [3 marks] c. How many students failed the exam (i.e. scored less than 49%)? [1 mark] d. Your friend claims he scored in the 99th percentile on his exam. What mark must...
Suppose your fifth grade sibling came to you and told you that on their last test...
Suppose your fifth grade sibling came to you and told you that on their last test in Math, the student teacher had informed them that the class had an average of 76 and a standard deviation of 10. How best can you explain to your sibling what this all means? Bear in mind that this is a fifth grader you're talking to and a 12 year old.
2. (4 pts) Suppose the waiting time (in minute) for a taxi is Exp(4) distributed. What...
2. (4 pts) Suppose the waiting time (in minute) for a taxi is Exp(4) distributed. What is the probability of waiting 12 minutes or more given you have already waited for 10 minutes? (Circle only one) 1-е-з Other, please specify: C. d. 13. (10 pts) James an eighth grader from Seward, NE took a standardized test and scored 685. The standardized test was distributed normally with mean 605 and standard deviation 90. Lily-also an eighth grader- from Dubuque, IA took...
Question 4 (10 points) Suppose a new standardized test is given to 100 randomly selected third-...
Question 4 (10 points) Suppose a new standardized test is given to 100 randomly selected third- on the test is 58, and the grade students in New Jersey. The sample average score sample standard deviation, sy, is 8. evel. (a) Test Ho : μY-60 vs H1 : μYメ60 at a 1% significance (b) Construct a 90% confidence interval for the mean score of all New Jersey third graders (c) Suppose the same test is given to 200 randomly selected third...
(13 points) Scores on the GRE. A college senior who took the Graduate Record Examination exam...
(13 points) Scores on the GRE. A college senior who took the Graduate Record Examination exam scored 620 on the Verbal Reasoning section and 750 on the Quantitative Reasoning section. The mean score for Verbal Reasoning section was 467 with a standard deviation of 109, and the mean score for the Quantitative Reasoning was 441 with a standard deviation of 155. Suppose that both distributions are nearly normal. Round calculated answers to 4 decimal places unless directed otherwise. 1. Write...
Chapter 7 Test Due in 7 hours, 27 minutes. Due Thu 07/30/2020 11:59 Questions Question 1...
Chapter 7 Test Due in 7 hours, 27 minutes. Due Thu 07/30/2020 11:59 Questions Question 1 (0/10) Question 2 [10/10] Question 3 (0/10) Question 4 [10/10) Question 5 [10/10] Question 6 (0/10) Question 7 [10/10) C Question 8 (0/10) The average price of a college math textbook is $169 and the standard deviation is 525. Suppose that 49 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of I? - N...
0/2 pts Question 3 On a certain standardized test . The mean is 54 .The standard deviation is 10 .Scores are whole numbers . Connie scored 34 Find numbers a and c such that Connie scored higher than approximately 100-d' (a) percent of people who took the test. Make a continuity correction. What is 100c a? Correct Answer 101.95
0/2 pts Question 3 On a certain standardized test . The mean is 54 .The standard deviation is 10 .Scores are...
1. On a national standardized test Jimmy gets results that say he scored in the 95th percentile. This means (a) Jimmy got 95% of the questions correct on the test. (b) Jimmy's score was two standard deviations above the mean. (c) Of the students that took the exam, 95% scored the same or lower than Jimmy. (d) Of the students that took the exam, 5% scored the same or lower than Jimmy. 2. A high school offers three foreign language...
THINKING/COMMUNICATION 7. A post-secondary class has 600 students. The mean grade on their midterm exam is 70%, with a standard deviation of 15. a. Find the Z-score of a student who scored 80% on his exam. [2 marks] b. Find the percentage of students who failed the exam. [3 marks] c. How many students failed the exam (i.e. scored less than 49%)? [1 mark] d. Your friend claims he scored in the 99th percentile on his exam. What mark must...
2. (4 pts) Suppose the waiting time (in minute) for a taxi is Exp(4) distributed. What is the probability of waiting 12 minutes or more given you have already waited for 10 minutes? (Circle only one) 1-е-з Other, please specify: C. d. 13. (10 pts) James an eighth grader from Seward, NE took a standardized test and scored 685. The standardized test was distributed normally with mean 605 and standard deviation 90. Lily-also an eighth grader- from Dubuque, IA took...
Question 4 (10 points) Suppose a new standardized test is given to 100 randomly selected third- on the test is 58, and the grade students in New Jersey. The sample average score sample standard deviation, sy, is 8. evel. (a) Test Ho : μY-60 vs H1 : μYメ60 at a 1% significance (b) Construct a 90% confidence interval for the mean score of all New Jersey third graders (c) Suppose the same test is given to 200 randomly selected third...
(13 points) Scores on the GRE. A college senior who took the Graduate Record Examination exam scored 620 on the Verbal Reasoning section and 750 on the Quantitative Reasoning section. The mean score for Verbal Reasoning section was 467 with a standard deviation of 109, and the mean score for the Quantitative Reasoning was 441 with a standard deviation of 155. Suppose that both distributions are nearly normal. Round calculated answers to 4 decimal places unless directed otherwise. 1. Write...
Chapter 7 Test Due in 7 hours, 27 minutes. Due Thu 07/30/2020 11:59 Questions Question 1 (0/10) Question 2 [10/10] Question 3 (0/10) Question 4 [10/10) Question 5 [10/10] Question 6 (0/10) Question 7 [10/10) C Question 8 (0/10) The average price of a college math textbook is $169 and the standard deviation is 525. Suppose that 49 textbooks are randomly chosen. Round all answers to 4 decimal places where possible. a. What is the distribution of I? - N...
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