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2. 200 freshmen enrolled in the...
A set of final examination grades in an introductory statistics course is normally distributed, with a...
A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 73 and a standard deviation of 7. Complete parts (a) through (d). a. What is the probability that a student scored below 86 on this exam? (Round to four decimal places as needed.) b. What is the probability that a student scored between 66 and 93? (Round to four decimal places as needed.) c. The probability is 55% that a student taking...
examination grades in an introductory statistics course is normally distributed, with a mean of 75 and...
examination grades in an introductory statistics course is normally distributed, with a mean of 75 and a standard deviation of 7. Complete parts (a) through (d) a. What is the probablity that a student scored below 87 on this exam? The probability that a shudent scored below 87 is (Round to four decimal places as needed.) b What is the probability that a student scored between 68 and 94 The probability that a student soored between 68 and 94 is...
Each year about 1500 students take the introductory statistics course at a large university. This year...
Each year about 1500 students take the introductory statistics course at a large university. This year scores on the nal exam are distributed with a median of 74 points, a mean of 70 points, and a standard deviation of 10 points. There are no students who scored above 100 (the maximum score attainable on the nal) but a few students scored below 20 points. (a) Is the distribution of scores on this nal exam symmetric, right skewed, or left skewed?...
A new exam was written to be used as an entrance exam. You took the exam...
A new exam was written to be used as an entrance exam. You took the exam and your score report said that you got a score of 633 points out of 800 possible and that the mean and standard deviation for all test takers is μ = 400 and σ = 100 and the distribution is normal. What percentage of students taking the test scored higher than you did? The department decides to accept all the students who score in...
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...
Please show all work step by step. thank you! Please read the direction in every problem....
Please show all work step by step. thank you!
Please read the direction in every problem. Show all your work here. (Round probabilities to 4 decimals.) 1. A student earned grades of 84, 78, 84, and 72 on her four regular tests. She earned a grade of 78 on the final exam and 86 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the course grade, the final exam counts for...
(2 points) For students in a certain region, scores of students on a standardized test approximately...
(2 points) For students in a certain region, scores of students on a standardized test approximately follow a normal distribution with mean u = 543.4 and standard deviation o = 26.9. In completing the parts below, you should use the normal curve area table that is included in your formula packet. (a) What is the probability that a single randomly selected student from among all those in region who took the exam will have a score of 548 or higher?...
Standard Deviation Problem Example. Please answer the problems a,b,c, and d listed below. Please demonstrate how...
Standard Deviation Problem Example. Please answer the problems
a,b,c, and d listed below. Please demonstrate how you solved these
problems. I'd greatly appreciate it. :) Thanks in advance.
a ) How many students took the exam?
b) What was the mean exam score? Make sure you follow the rules
for significant digits.
c) What was the standard deviation for the class?
d) How many students fall outside +/- 1 standard deviation from
the mean?
The exams scores for a group...
Problem 1. 531.1 and standard deviation a-29.4 (2 points) The scores of students on the SAT...
Problem 1. 531.1 and standard deviation a-29.4 (2 points) The scores of students on the SAT colloge entrance examinations at a certain high school had a normal distribution with mean (a) What is the probability that a single student randomly chosen from all those taking the test scores 536 or higher? ANSWER For parts (b) through (d), consider a simple random sample (SRS) of 30 students who took the test (b) What are the mean and standard deviation of the...
just the last ones on this A trucking company determined that the distance traveled per truck...
just the last ones on this
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (c) below. a. What proportion of trucks can be expected to travel between 69 and 80 thousand miles in a year? The proportion of trucks that can be expected to travel between 69 and 80 thousand miles in a year...
examination grades in an introductory statistics course is normally distributed, with a mean of 75 and a standard deviation of 7. Complete parts (a) through (d) a. What is the probablity that a student scored below 87 on this exam? The probability that a shudent scored below 87 is (Round to four decimal places as needed.) b What is the probability that a student scored between 68 and 94 The probability that a student soored between 68 and 94 is...
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...
Please show all work step by step. thank you!
Please read the direction in every problem. Show all your work here. (Round probabilities to 4 decimals.) 1. A student earned grades of 84, 78, 84, and 72 on her four regular tests. She earned a grade of 78 on the final exam and 86 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the course grade, the final exam counts for...
(2 points) For students in a certain region, scores of students on a standardized test approximately follow a normal distribution with mean u = 543.4 and standard deviation o = 26.9. In completing the parts below, you should use the normal curve area table that is included in your formula packet. (a) What is the probability that a single randomly selected student from among all those in region who took the exam will have a score of 548 or higher?...
Standard Deviation Problem Example. Please answer the problems
a,b,c, and d listed below. Please demonstrate how you solved these
problems. I'd greatly appreciate it. :) Thanks in advance.
a ) How many students took the exam?
b) What was the mean exam score? Make sure you follow the rules
for significant digits.
c) What was the standard deviation for the class?
d) How many students fall outside +/- 1 standard deviation from
the mean?
The exams scores for a group...
Problem 1. 531.1 and standard deviation a-29.4 (2 points) The scores of students on the SAT colloge entrance examinations at a certain high school had a normal distribution with mean (a) What is the probability that a single student randomly chosen from all those taking the test scores 536 or higher? ANSWER For parts (b) through (d), consider a simple random sample (SRS) of 30 students who took the test (b) What are the mean and standard deviation of the...
just the last ones on this
A trucking company determined that the distance traveled per truck per year is normally distributed, with a mean of 80 thousand miles and a standard deviation of 10 thousand miles. Complete parts (a) through (c) below. a. What proportion of trucks can be expected to travel between 69 and 80 thousand miles in a year? The proportion of trucks that can be expected to travel between 69 and 80 thousand miles in a year...
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