B. Given the following situations, write A, if it is two-tailed, B if one-tailed (left-tailed), and C if one-tailed (right-tailed).1.A mother wants to prove that listening to classical music improves children'sthinking process.2.The principal of a certain school claims that the dropout rate for the certainmunicipality is higher than 25%.3. Research on whether computer aided instruction is the same as lecture methodof a lesson presentation.Research on smoking lessens the life span of a person.5. Determine whether the mean monthly salary of call center agents is 25,000 amonth.6. Research on processed foods lessens the life span of a person.7.A government official claims that the dropout rate for local schools is 25%.8.A civil engineer is trying to prove that his new method of laying blocks is moreeffective than the traditional method.9.A new stockbroker, named XYZ, claims that their brokerage fees are lower thanthat of the current fee.10. A government official claims that the dropout rate for local schools is 25%.45

For the given situations, we need to write A if it is two-tailed, B if one-tailed (left tailed), and…

Answered: B. Given the following situations,…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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3899 you're a data analyst for an insurance company. You want to make sure that your employer is not over-paying for car repairs. To investigate this, you bring 38 different cars to two different garages, Bubba's Hubcap Heaven and Repair, and Merle's Motor Shop. Some of the cars need lots of repairs. Some of the cars need very few. By taking each car to both shops, we can directly compare the two sets of prices. Before running your analysis, be sure to look at the data file and verify that each car requires a different amount of repairs, and that prices in one shop are correlated with prices at the other shop. That is, they're in the same ballpark. The question is whether one tends to charge more, on average, than the other. Your task is to use Excel to test the research hypothesis that prices are different in the two shops; the null hypothesis is that prices are equal between the two shops. You test at the alpha = 0.01 significance level. What do you conclude? Are prices the same?…
3. Determine whether each of the following settings describes an observational study or an experiment. Explain your reasoning. (a) A veterinarian wants to see if a new diet food helps dogs to lose weight. She selects 10 golden retrievers in her practice and records their weights. Then she gives the dogs the new food for one month. She weighs the dogs again after one month and compares the weights. (b) A researcher wants to see how many college students are willing to clean up after someone else. He goes to the cafeteria and leaves a tray of dirty dishes out on a table during lunch time. Then he waits and calculates of the proportion of students who clean up the tray.
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Which of the following is a research hypothesis? A. Liberals and conservatives have the same voting rates. B. The rates of that senior citizens receive moving violations are not different from rates of moving violations seen in teenagers. C. White and African Americans watch the same amount of TV. D. Men and women have different levels of income.
A high school track coach wanted to test whether giving the students an energy drink could affect performance during the 100 meter race. The coach split the 26 boys into two equal sized groups, where Group 1 was given the energy drink and Group 2 was not. The 100 meter race times were recorded during practice and shown in the table below. What inference can be made about the results? Group 1 Group 2 12.2 13 12.5 12.3 13.3 12.8 12.9 13 13 13.8 12.1 13 13 13 13 13 12.1 13 13 13 12.1 13 12.8 13 13 12.6 Mean: 12.7 Mean: 13 Since the simulation shows ( many cases or free cases )? where a mean difference of ( solve for this answer ) or less occurred when the groups were re-randomized, it can be inferred that the mean difference observed in the study was ( very possibly or very unlikely ) ?due to the random assignment of participants into groups, so the results of the study are (…
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M-1 Please I need help with this question needed a very clear and step-by-step explanation and needed with clear handwriting please, will be really appreciated your help.
What type of statement is this? "Children of parents with college degrees are more likely to obtain college degrees themselves." a. research question b. research hypothesis c. research purpose statement d. Null hypothesis .
Please explain
14. A researcher is conducting a case study of a famous artist. She interviewed the artist, the artist's friends, and the artist's colleagues. She is then going to describe the artist using his own words (and the words of his friends and colleagues), while looking for some themes she finds in their descriptions. What type of research is this? Qualitative Quantitative
23. Andrews Middle School has gathered data for their students' transportation to and from school. Method of Transportation Female Male Bus 94 102 Car 38 32 Walk 40 44 What is the frequency of students, in total, who ride a bus to and from school? O The frequency of students who ride the bus cannot be determined using the data in the table. 196 students 94 0.92(100) = 92%of students 102 102 students

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