Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a...
Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a standard deviation of 6.1 points. What percent of students scored below 70 points?
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Scores on an exam follow an approximately Normal distribution
with a mean of 76.4 and a...
Suppose test scores on a certain exam follow a normal distribution with μ = 70. If...
Suppose test scores on a certain exam follow a normal distribution with μ = 70. If 8% of students scored above 80, what is the standard deviation of the distribution?
Assume that scores on the verbal portion of the GRE (Graduate Record Exam) follow the normal...
Assume that scores on the verbal portion of the GRE (Graduate Record Exam) follow the normal distribution with mean score 151 and standard deviation 7 points, while the quantitative portion of the exam has scores following the normal distribution with mean 153 and standard deviation 7.67. Use this information to answer the following: (Please round to two decimal places) a) Find the score of a student who scored in the 80th percentile on the Quantitative Reasoning section of the exam....
The scores on a statistics exam had an approximately normal distribution, with a mean of 73...
The scores on a statistics exam had an approximately normal distribution, with a mean of 73 and standard deviation of 7.2. If a single student is chosen at random, what is the probability their score is less than 74?
In 2003, scores on the math part of the SAT approximately followed a normal distribution with...
In 2003, scores on the math part of the SAT approximately followed a normal distribution with mean 519 and standard deviation 115. (a) What proportion of students scored above 510? (4 marks) (b) What proportion scored between 400 and 600? (6 marks)
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form an approximately normal distribution that has 500 points and 100 points. Letter grades on the exam were distributed as follows: Ds made up 15% of the exam, Ca 59%, Bs 13.5%, As 2.5%, and the rest Fs. () If 1466 students scored 733 points or more, how many students took the exam? students (b) What are the point cutoffs for each letter grade? <A...
(1 point) The summer monsoon rains in India follow approximately a Normal distribution with mean ...
(1 point) The summer monsoon rains in India follow approximately a Normal distribution with mean 852 millimeters (mm) of rainfall and standard deviation 82 mm. Note: Use Table A to nnd the proportion or percentage below (a) In the drought year 1987, 697 mm of rain fell. In what percent of all years will India have 697 mm or less of monsoon rain? (b) "Normal rainfall. means within 20% or the long-term average, or between 683 mm and 1022 mm...
The scores on the SAT verbal test in recent years follow approximately the normal distribution distribution....
The scores on the SAT verbal test in recent years follow approximately the normal distribution distribution. Students get a mean score of 517 with a standard deviation of 111. Use technology to answer these questions. a. What is the proportion of students scoring under 400 (4 decimal positions)? b. What is the proportion of students scoring between 400 and 5507 (4 decimal positions) c. What is the proportion of students scoring over 5507 (4 decimal positions) d. How high must...
The scores on the SAT verbal test in recent years follow approximately the normal distribution distribution....
The scores on the SAT verbal test in recent years follow approximately the normal distribution distribution. Students get a mean score of 533 with a standard deviation of 109. Use technology to answer these questions. a. What is the proportion of students scoring under 400 (4 decimal positions)? b. What is the proportion of students scoring between 400 and 550? (4 decimal positions) c. What is the proportion of students scoring over 550? (4 decimal positions) d. How high must...
Statistics exam scores follow a standard normal distribution with mean 0 and standard deviation 1. Find...
Statistics exam scores follow a standard normal distribution with mean 0 and standard deviation 1. Find each of the following probabilities of the given scores. (a)Less than 2.71 (b)Greater than -0.96 (c)Less than -2.18 (c)Between -1.30 and 0.45 (d)Find the 75th percentile of these Statistics exam scores. (e) Find the Statistics exam scores that can be used as cutoff values separating the most extreme (high and low) 2% of all scores.
3. Exam grades across all students across all sections of an introductory statistics class are approximately...
3. Exam grades across all students across all sections of an introductory statistics class are approximately normally distributed with a mean of 72 and a standard deviation of 11. Use the normal distribution to find answer the following questions. a. What percent of students scored above a 90%? b. What percent scored below 60%? c. If the lowest 5% of students will be required to attend an extra study session, what grade is the cutoff for being required to attend...
miben so with the 68-95-99.7 Rule) on the included normal distribution 1. Suppose exam scores form an approximately normal distribution that has 500 points and 100 points. Letter grades on the exam were distributed as follows: Ds made up 15% of the exam, Ca 59%, Bs 13.5%, As 2.5%, and the rest Fs. () If 1466 students scored 733 points or more, how many students took the exam? students (b) What are the point cutoffs for each letter grade? <A...
(1 point) The summer monsoon rains in India follow approximately a Normal distribution with mean 852 millimeters (mm) of rainfall and standard deviation 82 mm. Note: Use Table A to nnd the proportion or percentage below (a) In the drought year 1987, 697 mm of rain fell. In what percent of all years will India have 697 mm or less of monsoon rain? (b) "Normal rainfall. means within 20% or the long-term average, or between 683 mm and 1022 mm...
The scores on the SAT verbal test in recent years follow approximately the normal distribution distribution. Students get a mean score of 517 with a standard deviation of 111. Use technology to answer these questions. a. What is the proportion of students scoring under 400 (4 decimal positions)? b. What is the proportion of students scoring between 400 and 5507 (4 decimal positions) c. What is the proportion of students scoring over 5507 (4 decimal positions) d. How high must...
The scores on the SAT verbal test in recent years follow approximately the normal distribution distribution. Students get a mean score of 533 with a standard deviation of 109. Use technology to answer these questions. a. What is the proportion of students scoring under 400 (4 decimal positions)? b. What is the proportion of students scoring between 400 and 550? (4 decimal positions) c. What is the proportion of students scoring over 550? (4 decimal positions) d. How high must...
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