High-power experimental engines are being developed by the Stevens Motor Company for use in its new sports coupe. The engineers have calculated the maximum horsepower for the engine to be 800 HP. Sixteen engines are randomly selected for horsepower testing. The sample has an average maximum HP of 860 with a standard deviation of 80 HP. Use the confidence interval approach to determine whether the data suggest that the average maximum HP for the experimental engine is significantly different from the maximum horsepower calculated by the engineers. Use a significance level of a = 0.01. Assume the population of the maximum horsepower of engines is normally distributed. Step 1 of 2: Calculate a confidence interval for the average maximum HP for the experimental engine. Round your answers to two decimal places.

Jasmine’s current grades in Algebra I are the following. Jasmine’s grades: Grading System: Tests: 56, 72, 76, and 88 Quizzes: 66, 80, 71, 94 Assignments: 75% Final Exam: 86% Tests: 40% Quizzes: 25% Assignments: 10% Final Exam: 25% a.  What is Jasmine’s current grade in the class? b.  If she scores 10 points higher on the final exam, what would her new average be in the class?

A merchant surveyed 540 people to determine the way they learned about an upcoming sale. The survey showed that 210 learned about the sale from the​ radio, 250 from​ television, 200 from the​ newspaper, 100 from radio and​ television, 50 from radio and​ newspapers, 90 from television and​ newspapers, and 30 from all three sources. How many people learned of the sale from newspapers or​ radio, but not​ both?

Provide the complete solution and illustration

our sample size is 30 Calculate the test statistic and p-value. Assuming that α = 0.01, what is the appropriate conclusion to make? Group of answer choices Since the p-value is greater than 0.01, we fail to reject the null hypothesis and have insufficient evidence to conclude that at least one plant group’s mean weight is different. Since the p-value is greater than 0.05, we fail to reject the null hypothesis and have insufficient evidence to conclude that at least one plant group’s mean weight is different. Since the p-value is greater than 0.01, we reject the null hypothesis and conclude that at least one plant group’s mean weight is different. Since the p-value is less than 0.05, we reject the null hypothesis and conclude that at least one plant group’s mean weight is different.

Q. There are 10 people stand in a line to take a photo. Two photos are said different if at least two people's positions are changed. How many different photos can we take?