33. Researchers do not want to make a Type II error, because iftheir study has an effect, they want to be able to find it.Thus, they make their studies as powerful as they can. Ofthe following, the best way to increase the power of a studyis to:a. raise the significance level used for the study.b. test a large sample.c. use inferential statistics.d. compute fewer statistical analyses.34. By definition, mixed-methods research designs:a. include a number of quantitative measures of studentperformance.b. include both descriptive and inferential statistics in theanalysis.c. include both relationship questions and differencequestions in the same study.d. include both quantitative and qualitative data.

“Since you have posted multiple questions, we will provide the solution only to the first question…

Answered: 33. Researchers do not want to make a…

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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frisi wants to check the support of political parties in the Reykjavík area and decided to stand at the entrance of Kringlan one weekend and ask people what they are going to vote for. It was Kringlukast and a lot of good offers so many made their way there this weekend. Iris received a total of 834 answers to the question, what are you going to vote for in the upcoming election? "What is the main statistical problem with Iris' survey? 1. It is not corrected for placebo effect. 2. There is a risk of research bias in the survey. 3. There is a risk of sampling in the survey. 4. The number of participants is small and therefore the hypothesis tests that will be performed will have little strength. Assume that the time it takes to run the New Year's race follows a normal distribution with an average of 50 minutes and a standard deviation of 10 minutes. Questions 10 and 11 deal with the New Year's race. Question 10 Lalla sadly, runners who do not finish the race in less than 60 minutes feel…
What statistical methods are typically used in an inferential study?
Which of the following is NOT a misuse of statistics?Choose the correct answer below.A.Utilizing valid statistical methods and correct sampling techniquesB.Concluding that a variable causes another variable because they have some correlationC.Misleading graphsD.Making conclusions about a population based on a voluntary response sample
B. A sample data has a distribution that has a single mode and is strongly positively skewed. An analyst computes three measures of location for this data; the mean, the median and mode. (i) State the largest of these three location measures. (ii) Suggest, with a reason, which would be the best measure of location.
2. What is the sample size of a certain study if the population size is 1,000,000 and 10% margin of error are expected? a.400 c,200 b.300 d.100 3.Which of the following examples is secondary data? a.Direct Interview c.journals b.Indirect or Questionnaire d.Observation
13. Reliability enables testers to determine: The extent to which the test reflects the content of the course b. The relationship between criterion referenced and norm referenced evaluation meanires e Teacher effectiveness d. Proportion of variance in test scores due to the true differences within a group of individuals
2) Researchers are interested in whether there is any relationship between a person's IQ (x- variable) and how long they live (y-variable). Answer the questions below by using the data provided. Show your work and use the back of the page if necessary. X Y 10 3 6. 6. 7 4 3 4 a) What type of statistical analysis would be most appropriate to use in this scenario? Please justify your answer. b) Please state the null and alternative hypotheses. c) Please report the results of your statistical analyses and make a decision about whether to reject or fail to reject the null hypothesis Use alpha = .05 (two-tailed). %3D
A sociologist is interested in the opinion of Minnesota teachers on the recent labor union law passed by Wisconsin lawmakers. a. What is the experimental unit? b.What is the population? c.What are the variables relevant to this study? Classify them as continuous, discrete, nominal, or ordinal. d. Explain how you would select a sample for this study. Explain pros and cons of your method.
Do you think that by choosing the statistical analysis first, and then deciding upon what kind of research plan (i.e., so that the data will suit the analysis) could bias the entire research enterprise?
Identify which statistical test is to be used in the following problems. 1. Is the given sample mean of 74 production units per day equal to the population mean? 2. Would thirty high school graduating students change in their self-concept after knowing they had passed an important test? 3. Is employee’s rank correlated with efficiency rating? 4. Did the method of teaching interact with students’ learning styles? What is the interaction effect of the method of teachings and medium of instruction on the achievement of students in Probability and Statistics? 5. Is IQ level associated with gender? 6. Is there a significant difference between the two sections of Senior High School in terms of academic achievement in Calculus?
A chemical engineer is studying the effect of temperature and stining rate on the yield of a certain product. The process is run 16 times, at the settings indicated in the following table. The units for yield are percent of a theoretical maximum. Temperature (*C) Stirring Rate (1pm) Yield (%) 110 30 70.27 110 32 72.29 111 34 72.57 111 36 74.69 112 38 76.09 112 40 73.14 114 75.61 114 44 69.56 117 74.41 117 73.49 122 79.18 122 52 75.44 130 54 81.71 130 56 83.03 143 58 76.98 143 60 80.99 Compute the correlation between temperature and yield, between stinring rate and yield, and between temperature and stiring rate. Do these data provide good evidence that increasing the temperature causes the yield to increase, within the range of the data? Or might the result be due to confounding? Explain. Do these data provide good evidence that increasing the stiring rate causes the yield to increase, within the range of the data? Or might the result be due to confounding? Explain. a. Б. C.
Choose the correct answer for the following questions. 1. One disadvantage of using computers to perform statistical analysis is: A. Computers make performing complex statistics much more difficult B. Complex statistical tests can be easily run on a computer but may be is interpreted by the novice researcher C. Data entry is much more time consuming D. Computer analyses create more sampling bias 2. What is the best method for measuring how students in your program are feeling about the program over a 2 year period of time? A. Latitudinal study B. Cohort study C. Cross-sectional study D. Quantitative study 3. Mary is measuring how students in her class feel one day. What type of research is she conducting? A. Longitudinal B. Cross-sectional C. Latitudinal D. Cross-reference

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