Grade point averages of math majors at a large distance education university are normally distributed with a mean of 2.85 and a standard deviation of 0.30. If a random sample of 25 math majors is selected from that university, what is the probability that the sample mean grade point average will be
a. either less than 2.709 or more than 2.955?
b. at least 2.757?
Grade point averages of math majors at a large distance education university are normally distributed with...
3) The grade point averages of a large population of college studenta is approximately normally distributed with mean 2.4 and standard deviation 0.8. What fruction of the students will possess a grade point average in excess of 3.0? 4) Refer to problem 3). If students possessing a grade point average lees than 1.9 are dropped from the college, what percentage of the students will be dropped?
Problem #6: The grade point averages (GPAs) of a large population of college students are approximately normally distributed with mean 2.5 and standard deviation 0.80. (a) What proportion of the students will possess a GPA greater than 3.0? (b) Suppose that 10 students are randomly selected from the student body. What is the probability that atmost 4 among 10 will possess a GPA greater than 3.0? (c) What would be the maximum GPA so that only 10% of the students...
1. The grade of a Math Quiz is normally distributed with its mean, 81 and standard deviation, 8.4. If a student is randomly selected in class, what is the probability that his or her score will be higher than 90? 2. The historical data of a company's annual sales is normally distributed with its mean, $330 million and its standard deviation, $45 million. Find the probability that the company's sales will be between $300 million and $ 400 next year?
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.56 and a standard deviation of 0.38. Using the empirical rule, what percentage of the students have grade point averages that are at least 1-422 Please do not round your answer Suppose that grade point averages of undergraduate students at one university have a bell shaped distribution with a mean of 2.61 and a standard deviation of 0.4 using the empirical...
In a large university, 20% of the students are business majors. A random sample of 100 students is selected, and their majors are recorded. d. What is the probability that the sample contains between 12 and 14 business majors?
(1 point) The number of pizzas consumed per month by university students is normally distributed with a mean of 14 and a standard deviation of 5. A. What proportion of students consume more than 17 pizzas per month? Probability = B. What is the probability that in a random sample of size 9, a total of more than 135 pizzas are consumed? (Hint: What is the mean number of pizzas consumed by the sample of 9 students?) Probability =
The wait times to see a doctor at a large clinic are normally distributed with a mean of 68.2 minutes and a standard deviation of 14.8 minutes. If a simple random sample of 25 patients is selected, find the probability that the sample mean wait time is more than 75 minutes. Round to four decimal places.
The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 2.1, 3.1, 2.6, 1.5, 0.6, 4.0, 2.1, 1.1, 3.6, 0.5, 2.1, 3.4 construct a 90% confidence interval for the population mean The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) 2.1 below. 1.5 Assume the population is normally distributed. 2.1...
The grade point averages of the students in a large statistics class follow a normal distribution with a mean of 3.0 and a standard deviation of 0.25. What is the probability that a randomly sampled student from this class has a GPA of less than 2.95? (hint: you will need to use the table on page 175)
Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5 and a standard deviation of 0.37. Using the empirical rule, what percentage of the students have grade point! averages that are no more than 1.76? Please do not round your answer. Answer(How to Enter) 2 Points Keypad