If a class is full of students like Pat, what is the mean mark? What is the standard deviation?
assuming n = 10 and p = 0.2
If a class is full of students like Pat, what is the mean mark? What is...
Assume that a random sample of 37 full-time UT students found that their mean cost of textbooks for class is $488 with a standard deviation of $59. Test the claim that the mean cost of textbooks for full-time students is more than the average from 2010 which is $460. The test statistic is 2.89. Find the p-value.
ii) Suppose that the final mark for students in MATH1131 is approximately normally distributed with mean 59 and the standard deviation 7.44. Given that the pass marks is 50, what percentage of MATH1131 stu- dents are expected to pass? ii) Suppose that the final mark for students in MATH1131 is approximately normally distributed with mean 59 and the standard deviation 7.44. Given that the pass marks is 50, what percentage of MATH1131 stu- dents are expected to pass?
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?
For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3.4 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between hours and hours on Statistics each week. b) 95% of the students spend between hours and...
1. (1 point) The ages of students in an evening class is normally distributed with mean 24 and standard deviation of 7, What fraction of students ages will be within 25 and 30? 256x 30
From the class survey, the mean birth weight of students is 7.1 pounds with a standard deviation of 1.1 pounds. At what weight is more than 80% of the students? Include a.) the distribution curve, b.) the z-curve, and c.) the solution.
A selective college would like to have an entering class of 1000 students. Because not all students who are offered admission accept, the college admits more than 1000 students. Past experience shows that about 83% of the students admitted will accept. The college decides to admit 1200 students. Assuming that students make their decisions independently, the number who accept has the B(1200, 0.83) distribution. If this number is less than 1000, the college will admit students from its waiting list....
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...
One college class had a total of 90 students. The average score for the class on the last exam was 86.3 with a standard deviation of 4.4. A random sample of 39 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 88? c. What is the probability that the sample mean will be more than 87? d. What is the probability that the sample mean...
According to a college survey, 22% ofall students work full time. a) Find the mean and standard deviation for the random variable X, representing the number of students who work full time in sample of size 16. Find the probability that from a random sample of size 10, three do not work full time. b)