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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Background: Morris Saldov conducted a study in Eastern and Central Newfoundland in 1988 to examine public attitudes towards social spending. In particular, the study tried to determine if knowing someone on public assistance (yes, no) affected one's views on social spending (too little, about right, too much). The data from the study is summarized in the table below. Too little About right Too much Total Source: Morris Saldov, Public Attitudes to Social Spending in Newfoundland," Canadian Review of Social Policy, 26, November 1990, pages 10-14. Directions: Conduct a chi-square test for independence to determine if the association between knowing someone on public assistance and views on social. spending is statistically significant. Yes No No 42 7 1. Choose the correct null and alternative hypotheses. O Ho: There is no association between knowing someone on public assistance and views on social spending. Ha There is an association between knowing someone on public assistance and views…
19. Schools are ranked on their retention rate, the percent of students that come back from one year to the next. Below is the retention rate at a hypothetical school. If the school ignores the freshman to sophomore rate and just reports the that they have an over 90% retention rate, what is the particular term we talked about for the misleading thing they are doing? Freshman to sophomore 76% Sophomore to junior Junior to senior 92% 97%
21. In a classic study of procrastination by Lay (1986), in an introductory psychology class, students received a survey that measured procrastination. Participants were instructed to complete the survey and return it to the researcher by mail. High-procrastinating partici- pants were identified by their degree of agreement with survey items like, “I often find myself performing tasks that I had intended to do days before." Interest- ingly, the researcher also measured the amount of time that it took for participants to return the survey. The following represents the number of days that some of the high procrastinators waited to return the survey: 14 15 5 2 1 2 19 6 18 a. Use a one-tailed test with a = .05 to test the hypoth- esis that high procrastinators waited more than one day to return the survey. b. Compute the 95% confidence interval for the mean amount of time required to return the survey. c. Write a sentence showing the outcome of the hypoth- esis test and the confidence…
6
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.
3
18. Suppose that in a book club, 60% of the members are women, and 35% like to read poetry. If reading poetry is independent of gender, what percent of people in the book club are women who like to read poetry? Group of answer choices 74% 25% 95% 21%
1. Consider the various graphical displays that were introduced in this chapter. Which graphical display do you think would be the most helpful in relaying information to a specific audience and which would be the least helpful? Make sure to give a detailed explanation on why you think a given graphical display might or might not be helpful. 2. Suppose you were taking a statistics course where the final grade breakdown ended up being the following: 8 A's, 6 B's, 5 C's, 2 D's, 1 F. Create a bar graph of this data using either your calculator or iPad and upload an image of that bar graph on this discussion. Please visit the uploading images page on Canvas for instructions on how you can upload images for this discussion. 3. Analyze the graphic below and write a quick reflection on what you believe the graph is communicating. Your reflection should be at least 4 sentences long. If you need help figuring out what the graph is trying to communicate, then there are a few questions on the…
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
2.
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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