A manufacturer of equipment for boats is interested in producing a new type of marine radio with an emergency homing beacon. It is expensive to set up production, so the manufacturer wants to determine the level of interest in purchasing such a device before money is invested in this venture. The company is located in the West Coast, which is it primary market. The company decides to randomly select 12 of the marinas on the West Coast and then demonstrate the prototype to all of the boat owners at these marinas and gauge the potential market for the device. What sampling method did the company use to gather its data? * stratified simple convenience cluster

A​ 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left​ hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. A​ 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left​ hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. Among  257  ​trials, the touch therapists were correct  105  times. Use a  0.01  significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest that touch therapists are​ effective?

This is a practice exam.  I would like to know how to slove usign excel or megastat Wenton Powersports produces dune buggies. They have three assembly lines, “Razor,” “Blazer,” and “Tracer,” named after the particular dune buggy models produced on those lines. Each assembly line was originally designed using the same target production rate. However, over the years, various changes have been made to the lines. Accordingly, management wishes to determine whether the assembly lines are still operating at the same average hourly production rate. Production data (in dune buggies/hour) for the last eight hours are as follows. (You may find it useful to reference the F table.)   Razor   Blazer   Tracer   11       10       9     10       8       9     8       11       10     10       9       9     9       11       8     9       10       7     12       11       8     12       8       9         Click here for the Excel Data File   a. Specify the competing hypotheses to…

Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.