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The marks obtained by the students at an examination are found to be normally distributed with...
The marks obtained in statistics in a certain examination are found to be normally distributed. If...
The marks obtained in statistics in a certain examination are found to be normally distributed. If 15% of the candidates got greater than or equal 80 marks and 40% of candidates got less than 50 marks, find the mean and standard deviation of marks.
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?
The IQ scores of college students are normally distributed with the mean of 120 and standard...
The IQ scores of college students are normally distributed with the mean of 120 and standard deviation of 10. If a random sample of 25 students is taken, what is the probability that the mean of this sample will be between 120 and 125. (49.38%)
The marks of 800 candidates in an examination were normally distributed with a mean of 45...
The marks of 800 candidates in an examination were normally distributed with a mean of 45 marks and standard deviation of 20 marks. If 5% of the candidates obtained a distinction by scoring X marks or more, estimate the value of X ; [4 Marks] Estimate the interquartile range of the marks. [6 Marks]
A set of final examination grades in a calculus course was found to be normally distributed...
A set of final examination grades in a calculus course was found to be normally distributed with a mean of 69 and a standard deviation of 8. Only 5% of the students taking the test scored higher than what grade? (Ch 6) answer is 83.81 but please show and explain how, what z table you used and the numbers. thanks
A set of final examination grades in a calculus course wasfound to be normally distributed with...
A set of final examination grades in a calculus course wasfound to be normally distributed with a mean of 69 and a standarddeviation of 9. a. what is the probality of getting a grade of 91or less on this exam? b. What percentage of students scored between 65 and89? c. What percentage of students scored between 81 and89? d. Only 5% of the students taking the test scored higherthan what grade?
The exam scores on a certain Society of Actuaries (SOA) professional examination are Normally distributed with...
The exam scores on a certain Society of Actuaries (SOA)
professional examination are Normally distributed with a mean score
of μ=67% and a standard deviation of σ=5%.
(1 point) The exam scores on a certain Society of Actuaries (SOA) professonal examination are Normally distributed with a mean score of u = 67% and a standard deviation of o= 5%. (a) What is the probability that a random chosen person who is writing this SOA exam will score at most 69%?...
Suppose that the weight students gain in their first year of college is Normally distributed with...
Suppose that the weight students gain in their first year of college is Normally distributed with a mean of 10 pounds and a standard deviation of 2 pounds. (a) What is the probability that a randomly selected student will gain between 6 and 8 pounds? (b) Suppose we pick 5 students at random. What is the probability at least one will gain between 6 and 8 pounds? (c) If 30 students are randomly selected, what is the probability that the...
2. A random variable is normally distributed s normally distributed with a mean of u =...
2. A random variable is normally distributed s normally distributed with a mean of u = 50 and a standard deviation of o = 5. a. Sketch a normal curve for the probability density 50, 55, 60, and 65. of the probability density function. Label the horizontal axis with values of 35, 40, 45, b. What is the probability that the rando Tobability that the random variable will assume a value between 45 and 55? Empirical Rule. c. What is...
Students across the U.S. take the ACT test, which has scores that are normally distributed with...
Students across the U.S. take the ACT test, which has scores that are normally distributed with a mean of 21 with a standard deviation of 5. If 250 students are randomly selected, what is the probability that at least 15 of them will score a 29 or better? A small college has an entering freshmen class of 600 students. Of these, 240 have brought their own personal computers to campus. A random sample of 110 entering freshmen was taken. What...
The marks obtained in statistics in a certain examination are found to be normally distributed. If 15% of the candidates got greater than or equal 80 marks and 40% of candidates got less than 50 marks, find the mean and standard deviation of marks.
The IQ scores of college students are normally distributed with the mean of 120 and standard deviation of 10. If a random sample of 25 students is taken, what is the probability that the mean of this sample will be between 120 and 125. (49.38%)
The exam scores on a certain Society of Actuaries (SOA)
professional examination are Normally distributed with a mean score
of μ=67% and a standard deviation of σ=5%.
(1 point) The exam scores on a certain Society of Actuaries (SOA) professonal examination are Normally distributed with a mean score of u = 67% and a standard deviation of o= 5%. (a) What is the probability that a random chosen person who is writing this SOA exam will score at most 69%?...
Suppose that the weight students gain in their first year of college is Normally distributed with a mean of 10 pounds and a standard deviation of 2 pounds. (a) What is the probability that a randomly selected student will gain between 6 and 8 pounds? (b) Suppose we pick 5 students at random. What is the probability at least one will gain between 6 and 8 pounds? (c) If 30 students are randomly selected, what is the probability that the...
2. A random variable is normally distributed s normally distributed with a mean of u = 50 and a standard deviation of o = 5. a. Sketch a normal curve for the probability density 50, 55, 60, and 65. of the probability density function. Label the horizontal axis with values of 35, 40, 45, b. What is the probability that the rando Tobability that the random variable will assume a value between 45 and 55? Empirical Rule. c. What is...
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