Please help me answer these questions.. i have tried doing it several times but got it incorrect
answer to first twp questions are (1. Gpa is 3.2)
(2. less than a week)
experiment with the remaining cars. C Each driver was assigned a new battery car and a regular battery car, but neither the driver nor the person assigning the car knew the order in which they drove the cars. 270 The results are shown in the box plot. The researchers concluded that new battery system did extend the life of the & battery by about 7%. new control a. Identify the Steps of a Statistical Process . Ask a question that can be answered with sample data. . Determine the information needed . Collect sample data that is representative of the population. . Summarize, interpret and analyze the sample data. . State the results and conclusion of the study. b. In this experiment, what is the explanatory variable and what is the response variable? c. Was there blinding done in this experiment? Explain. d. Suppose the researcher instead chose 48 drivers and each driver drove a single car. Would this create any lurking variables for the experiment?Math 10 MPS Experimental Design Name (gw4) C 1. A researcher wanted to know if students who use the library at a college have higher GPAs than students who do not use the library. The researcher decided to use a random number generator to choose 20 random classes at the college. Students in each of these classes were given surveys that could be filled out anonymously. Students that completed the surveys were given a $5 gift card for the bookstore. 82% of students in the sampled classes returned the surveys. Here are the two questions of interest: How often do you use the library? Never Less than once a week More than once a week, but not every day d. Every day What is your current GPA? a. What method of sampling was used by the researcher? b. Discuss the wording of the questions for possible bias. c. Is this an observational study or an experiment? Explain. d. The researcher concluded that students who use the library more frequently have higher GPAs. Is this a valid conclusion for this type of study? Explain.C 2. A researcher for an electric car company was testing a new battery system. The goal of the battery system was to extend the life of the battery before recharging is necessary. 48 identical model electric cars were selected. 24 cars were given the new battery system (treatment group), while the remaining 24 cars kept the old system (control group). All cars were then fully charged. 24 drivers were then assigned a car. They were not told whether they were driving a car with the new batteries or a car with the regular batteries. The drivers were all given the same route to drive. The drivers drove the cars until the battery ran dead. The mileage driven Electric Car - miles on one charge was then recorded. The 24 drivers then returned the next day to repeat the 250 experiment with the remaining cars. 240 Each driver was assigned a new battery car and a regular 210 battery car, but neither the driver nor the person assigning the car knew the order in which they drove the cars. 210 210 The results are shown in the box plot. The researchers concluded that new battery system did extend the life of the battery by about 7%. new control a. Identify the Steps of a Statistical Process . Ask a question that can be answered with sample data. . Determine the information needed . Collect sample data that is representative of the population. . Summarize, interpret and analyze the sample data. . State the results and conclusion of the study
