Mathematics, 12.04.2021 22:50, keasiabrown25

A certain test preparation course is designed to help students improve their scores on the GMAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in 4 students' scores on the exam after completing the course: 11,13,9,8 Using these data, construct a 90% confidence interval for the average net change in a student's score after completing the course. Assume the population is approximately normal. Step 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place.

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 21:40, dededese2403

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels. ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0

Answers: 1

continue

Mathematics, 22.06.2019 00:10, abelSeattle

Juanita wade's new car has an msrp of $28,902.11 including title and processing fees. the premier package which includes surround sound and dvd player costs three times the amount of the in-style package which includes leather seats and select wheels. the total cost of her new car was $34,290.08 which included the 6.5% sales tax. find the cost of the premier package to the nearest cent.

Answers: 3

continue

Mathematics, 22.06.2019 01:00, nyraimccall408

Which is an accurate comparison of the two data sets? the commute to work is typically shorter and more consistent than the commute home. the commute to work is typically shorter but less consistent than the commute home. the commute to work is typically longer and less consistent than the commute home. the commute to work is typically longer but more consistent than the commute home.

Answers: 2

continue

Mathematics, 22.06.2019 01:30, babbybronx

When you find the area of a triangle do you use in. or in2

Answers: 2

continue

Do you know the correct answer?

A certain test preparation course is designed to help students improve their scores on the GMAT exam...