Testing for population meanyou conduct a survey of a sample, Ask an Expert

Statistics

Testing for population mean.

You conduct a survey of a sample of 25 members of this year's graduating students and find that the average GPA is 3.2. The standard deviation of the sample is 0.4. Over the last 10 years, the average GPA has been 3.0. Is the GPA of this year's students significantly different from the long-run average? At what alpha level would it be significant? How would this information be useful to you if you were the college register?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9727237

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A random sample ofnbsp86nbspeighth grade students scores on

A random sample of 86 eighth grade? students' scores on a national mathematics assessment test has a mean score of 292. This test result prompts a state school administrator to declare that the mean score for the? state' ...

Two different batteries are being considered for an

Two different batteries are being considered for an industrial application. A random sample of 30 of Battery A produces a mean of 16.4 hours of useful voltage with a standard deviation of 3.2 hours. A sample of 30 of Bat ...

A cell phone company offers 15 different voice packages and

A cell phone company offers 15 different voice packages and 15 different data packages. Of those, 6 packages include both voice and data. How many ways are there to choose either voice or data, but not both?

Imagine you are the chief adviser to the australian prime

Imagine you are the Chief adviser to the Australian Prime Minister. 1) Clearly explain to him the meaning of 'subprime debt'? What are the risks and advantages of such financial instruments? a) What is a CDO? b) What is ...

Alphonse contributes 542 per year at the end of each year

Alphonse contributes $542 per year at the end of each year to his pension plan. Assuming he can earn 6.62 per year from his plan, what is the total valve of his account at the end of 7 years?

A clinical psychologist is the primary therapist for 18

A clinical psychologist is the primary therapist for 18 patients. She randomly selects a sample of 3 patients to be in her study. How many different samples of this size can be selected from this population of 18 patient ...

Acme airlines flies airplanes that seat 20 passengers from

Acme Airlines flies airplanes that seat 20 passengers. From experience, they have learned that, on average, 85% of the passengers holding reservations for a particular flight actually show up for the flight. If they book ...

A box contains n white and m black balls one ball is added

A box contains n white and m black balls. One ball is added randomly, white with probability p and black with probability 1 - p. Then a random ball is taken out from the box. (a) Find the probability that the taken ball ...

The service manager for anbspcar dealership reviewed sales

The service manager for a car dealership reviewed sales records of the past 25 sales of new cars to determine the number of warranty repairs he will be called on to perform in the next 90 days. Corporate reports indicate ...

Confidence1the daily sales of burger baby restaurants

Confidence 1.The daily sales of Burger Baby restaurants follow the normal distribution with a standard deviation of $4000. a. A sample is taken of 50 restaurants and the average sales were $40,000/day. What is the 99% co ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert