A sample of university students has an average GPA of 2.78 with a standard deviation of...

A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA is normally distributed, what percentage of the students has GPAs…..

More than 2.3?
Less than 3.0?
Between 2.00 and 2.5?

Expert Solution

orchestra answered 2 years ago

Students have an average GPA of 2.78 with a standard deviation of 0.45. You have been...

Students have an average GPA of 2.78 with a standard deviation of 0.45. You have been tasked by the university president to select a random sample of students, and to conduct in-depth interviews with them about how their academics were impacted by COVID-19. We would like the random students that you select to be representative of the entire student body, and therefore the GPA of your sample should be within 0.2 grade points of the population mean. How many students...

The average GPA at the University of North Carolina is 3.2, with a standard deviation of...

The average GPA at the University of North Carolina is 3.2, with a standard deviation of 0.3. Assume that all GPAs at the University of North Carolina are normally distributed. What is the probability of randomly selecting a student at the University of North Carolina with a GPA of 2.9 or lower? Possible answers: A. 0.10 B. 0.16 C. 0.24 D. 0.31 What is the probability of randomly selecting a student at the University of North Carolina with a GPA...

The average GPA for all college students is 2.95 with a standard deviation of 1.25. Answer...

The average GPA for all college students is 2.95 with a standard deviation of 1.25. Answer the following questions: What is the average GPA for 50 MUW college students? (Round to two decimal places) What is the standard deivaiton of 50 MUW college students? (Round to four decimal places)

At a large university, the students have an average creditcarddebt of $2500,with a standard deviation of...

At a large university, the students have an average creditcarddebt of $2500,with a standard deviation of $1200. If we consider all of the possible random samples of 100students at this university, 95% of thesamples should have means between what two numbers? [HINT-use the 68-95-99.7Rule table in conjunction with the values for the sampling distribution model] A)$100 and $2620 (B)$300 and $4900 (C)$2140 and $2860 (D)$2260 and $2740

In a university, the population mean GPA is 3.0 and the standard deviation of GPAs is...

In a university, the population mean GPA is 3.0 and the standard deviation of GPAs is 0.72. I’m going to draw samples of size n=100 The z-score of a sample average GPA of 2.95 is -0.69444444 The z-score of a sample average GPA of 2.8 is ____ The z-score of a sample average GPA of 2.9 is ____ The z-score of a sample average GPA of 3.15 is ____ The z-score of a sample average GPA of 3.25 is ____...

a. Is the average GPA of all currently enrolled students at the University of Florida an...

a. Is the average GPA of all currently enrolled students at the University of Florida an example of a parameter or a statistic? b. Is the number of magazines read last year by a collection of people an example of a discrete or continuous variable? c. Are cat breeds an example of a quantitative or a qualitative variable? d. What is the difference between a simple random sample and a stratified random sample?

The average GPA at a college is 2.73 with a standard deviation of 0.8. Find the...

The average GPA at a college is 2.73 with a standard deviation of 0.8. Find the probability that 10 randomly selected students will have an average GPA greater than 2.37

A study of 100 students in a local university gave the average GPA to be 3.1...

A study of 100 students in a local university gave the average GPA to be 3.1 with a standard deviation of.5. The same study revealed that in this sample, 20% are out of state students. 1. The lower bound, correct up to 3 decimal places for a 92% confidence interval for the actual GPA of students in this university is 2. The lower bound, correct up to 3 decimal places of a 90% confidence interval for the true proportion of...

study of 100 students in a local university gave the average GPA to be 3.1 with...

study of 100 students in a local university gave the average GPA to be 3.1 with a standard deviation of.5. The same study revealed that in this sample, 20% are out of state students. Question 1 100 students, the critical value at alpha=.06, to test the hypothesis that the true mean GPA is different from 3.0 is............. , while the test statistic value, correct up to 2 decimal places is................. Question 2 the same study with 100 students, the critical...

Question 1: A) If the mean GPA among students is 3.25 with a standard deviation of...

Question 1: A) If the mean GPA among students is 3.25 with a standard deviation of 0.75, what is the probability that a random sample of 300 students will have a mean GPA greater than 3.30? B) If the mean GPA among students is 3.25 with a standard deviation of 0.75, and we select a random sample of 300 people, at what value for the sample mean would be greater than exactly 95% of possible sample means? C) If the...

Question