The marks obtained by a number of students in a certain subject are assumed to be...
The marks obtained by a number of students in a certain subject are assumed to be approximately normally distribution with mean 55 and a S.D of 5. If 5 students are taken at random from this set, what is the probability that three of them would have scored marks above 60?
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The marks obtained by a number of students in a certain subject
are assumed to be...
The marks obtained by the students at an examination are found to be normally distributed with...
The marks obtained by the students at an examination are found to be normally distributed with u = 6565 and o = 6. If a random sample of 100 students is taken, what is the probability that the mean marks will be between 65 and 66?
The marks obtained by students from previous classes are normally distribution with a mean of 75...
The marks obtained by students from previous classes are normally distribution with a mean of 75 and a standard deviation of 10. the probability that a student is having a mark between 70 and 90 in this distribution? how many students will fail in Statistics if the passing mark is 65 for a class of 100 students?
this is the question a. The correlation coefficient between the number of students and marks obtained...
this is the question
a. The correlation coefficient between the number of students and marks obtained in end semester exam. (13 Marks) Give the statistical meaning of the relationship between the number of students and marks b. obtained in end semester exam. (3 Marks) Draw the number of students and marks obtained in end semester exam scatter diagram c. (4 Marks) Check list Write your name and ID corectly Write the question number properly Use your own calculator. Show all...
3. (a) Outline four (4) characteristics of the normal distribution. b. The marks scored by the...
3. (a) Outline four (4) characteristics of the normal distribution. b. The marks scored by the candidates in an examination are normally distributed with mean 54 and standard deviation 16 marks. If the top 12% of the candidates obtained distinction and the bottom 15% failed estimate correct to 2 significant figures: 1) the pass mark (ii) the least mark for distinction (C) Suppose that one in five customers buy product Y. If four customers are chosen at random: what is...
10. (a) In one indoor playground, the number of children playing at the playground has a Poisson ...
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10. (a) In one indoor playground, the number of children playing at the playground has a Poisson distribution with average 12 children in half an hour. Find the mean and variance of the number of children within 12.00pm to 2.30pm 3 marks] In a random survey, 6% of people take their dinner while watching television. If the sample consists of 50 adult and Y is the number of people in this sample who take...
The acceptable level for insect filth in a certain food item is 5 insect fragments (larvae,...
The acceptable level for insect filth in a certain food item is 5 insect fragments (larvae, eggs, body parts, and so on) per 10 grams. A simple random sample of 60 ten-gram portions of the food item is obtained and results in a sample mean of x = 5.7 insect fragments per ten-gram portion Complete parts (a) through (c) below. (a) Why is the sampling distribution of x approximately normal? A. The sampling distribution of x is approximately normal because...
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...
In previous years, the marks obtained in a French test by students attending Topnotch College have...
In previous years, the marks obtained in a French test by students attending Topnotch College have been modelled satisfactorily by a normal distribution with a mean of 65 and a standard deviation of 9. Teachers in the French department at Topnotch College suspect that this year their students are, on average, underachieving. In order to investigate this suspicion, the teachers selected a random sample of 35 students to take the French test and found that their mean score was 61.5...
3. Exam scores on a certain test are distributed normally, with a mean of 72 and...
3. Exam scores on a certain test are distributed normally, with a mean of 72 and a standard devi- ation of 12. (a) Find the 95th percentile for the exam. (b) Suppose a student who took the exam is selected at random. Find the probability that the student scored between 71 and 73. Draw a graph that illustrates the probability calculated. (C) If you take a simple random sample of 36 students who have taken this exam, what is the...
7. (a) Find the number of arrangement of the letters in the word DIFFERENTIAL 2 marks] (i) In one...
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7. (a) Find the number of arrangement of the letters in the word DIFFERENTIAL 2 marks] (i) In one selection session, how many ways to choose 11 football players from 2 marks] (b) 20 players? (ii) How many ways to choose one player for goalkeeper, four defenders, four midfielders and two attackers from the 11 players chosen? 2 marks] (iii) How many ways to arrange five players in the first row and the goalkeeper...
The marks obtained by the students at an examination are found to be normally distributed with u = 6565 and o = 6. If a random sample of 100 students is taken, what is the probability that the mean marks will be between 65 and 66?
this is the question
a. The correlation coefficient between the number of students and marks obtained in end semester exam. (13 Marks) Give the statistical meaning of the relationship between the number of students and marks b. obtained in end semester exam. (3 Marks) Draw the number of students and marks obtained in end semester exam scatter diagram c. (4 Marks) Check list Write your name and ID corectly Write the question number properly Use your own calculator. Show all...
Help me solve this qiestion asap
10. (a) In one indoor playground, the number of children playing at the playground has a Poisson distribution with average 12 children in half an hour. Find the mean and variance of the number of children within 12.00pm to 2.30pm 3 marks] In a random survey, 6% of people take their dinner while watching television. If the sample consists of 50 adult and Y is the number of people in this sample who take...
The acceptable level for insect filth in a certain food item is 5 insect fragments (larvae, eggs, body parts, and so on) per 10 grams. A simple random sample of 60 ten-gram portions of the food item is obtained and results in a sample mean of x = 5.7 insect fragments per ten-gram portion Complete parts (a) through (c) below. (a) Why is the sampling distribution of x approximately normal? A. The sampling distribution of x is approximately normal because...
In previous years, the marks obtained in a French test by students attending Topnotch College have been modelled satisfactorily by a normal distribution with a mean of 65 and a standard deviation of 9. Teachers in the French department at Topnotch College suspect that this year their students are, on average, underachieving. In order to investigate this suspicion, the teachers selected a random sample of 35 students to take the French test and found that their mean score was 61.5...
3. Exam scores on a certain test are distributed normally, with a mean of 72 and a standard devi- ation of 12. (a) Find the 95th percentile for the exam. (b) Suppose a student who took the exam is selected at random. Find the probability that the student scored between 71 and 73. Draw a graph that illustrates the probability calculated. (C) If you take a simple random sample of 36 students who have taken this exam, what is the...
Help me solve this question asap
7. (a) Find the number of arrangement of the letters in the word DIFFERENTIAL 2 marks] (i) In one selection session, how many ways to choose 11 football players from 2 marks] (b) 20 players? (ii) How many ways to choose one player for goalkeeper, four defenders, four midfielders and two attackers from the 11 players chosen? 2 marks] (iii) How many ways to arrange five players in the first row and the goalkeeper...
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