Study AUse the following description of a research study to answer the next fivequestions.Researchers were were interested in promoting physical activity within theworkplace. They recruited participants to join a team challenge encouragingways to increase physical activity such as taking active breaks and takingthe stairs. Participants either joined as a team or were assigned a team.These teams were then randomly assigned either to be the control groupwhere they just received information about becoming more active or theteam-building group, which received the same information as the controlgroup but were encouraged to create a team name and bond as a teamthroughout the study. One outcome measure of the study was the numberof flights of stairs that participants reported taking yesterday.Group StatisticsInterventionMeanStd. DeviationStd. Error MeanFlights of stairs yesterdayCbntrol182.38893.2924077603Team-building166.00005.501511.37538Lena TesEqualty atVarnceetEgualty of Meane9% Confidence terval ofSplancethe DferanceOneSidet TeSidedMeanSd EaDienceDiferenceLowerUpperFlghts of stairsEqual vartances12253611111534526.73683-4896414015yestrdayaumedEqual variancs ot23 31361116.87092-35130aumed Which of the following best describes the independent variable in thedescribed research (Study A)?O Intervention group (control vs team-building)O Flights of stairsO Team-building groupO Can't tell based on the information providedQuestion 18The flights of stairs was measured in this study based on participantsreporting the number of stairs they took yesterday. Which of the followingdescribes the scale of measurement of this variable?O IntervalOrdinalO RatioO Nominal

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Answered: The flights of stairs was measured in…

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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2. In the mid-19th century, Sir Francis Galton demonstrated, through extensive data collection, that many human characteristics such as height and IQ are distributed throughout the entire population in accordance with the normal distribution. Galton recorded the heights of 8585 men in Great Britain. This forms a normal distribution with mean u = 67 inches and standard deviation o = 2.5inches.
In a study looking at undergraduate students’ perceptions of sense of community at their university, a researcher hypothesizes that the farther away students live from campus (in miles), the less they feel they are part of the university community. The researcher collected data for the following two variables – miles from campus and part of community (rating from 1-10 of how much they felt part of the university community). what is the scale of measurement? (i.e., nominal, ordinal, interval or ratio)
The data used is from college campuses. The variables used in the analysis below include: crime, total campus crime; enroll, total enrollment; police, employed officers. Use the estimated OLS models to answer the questions below: Model A: In(crime) = -6.631 + 1.270ln(enroll), (1.034) (.110) n = 97; R² = .5804 Model B: In(crime) = -4.794 + .923ln(enroll) (.144) (1.112) n = 97; R² = .632 +.516ln(police), (.149) Using Model A, test the null hypothesis that elasticity of crime with respect to enrollment is unit elastic, i.e. equal to one (against a two-sided alternative). Calculate the t-statistic.
Look the image and answer the following questions: a. What is the independent variable (IV)? b. How many levels do we have for the IV? C. What is the level of measurement for the IV? d. What is the DV (remember, the DV is the data)? e.What is the level of measurement of the DV? f. Why a Bar graph is the best graph to display this data? Explain g. Construct a Bar graph that incorporates all the information in this table. h. Looking at your graph, do you think that the relaxation training really worked. Explain your answer.
In a typical set of numerical data, what fraction of the data values lie above Q3?
Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective lenses they made the time period of January 1 to March 31. The table gives the defect and the number of defects. Do the data support the notion that each defect type occurs in the same proportion? Test at the 5% level. Number of Defective Lenses Defect type Number of defects Scratch 1866 Right shaped - small 1935 Flaked 1979 Wrong axis 1921 Chamfer wrong 1864 Crazing, cracks 1991 Wrong shape 2004 Wrong PD 1895 Spots and bubbles 1917 Wrong height 1885 Right shape - big 1875 Lost in lab 1886 Spots/bubble - intern 1935 State the hypotheses.H0: Each defect type in the same proportion.Ha: Each defect type in the same proportion. Calculate the χ2 test statistic. Round expected values to two decimal places. Round χ2 to three decimal places.χ2 = Calculate the p-value. Round to four decimal places.p-value = State your decision.Since p-value 0.05,…
Determine the level of measurement for each of the following variables:a. The number of people in your statistics classb. The percentage of students who are first-generation college students at your schoolc. The name of each academic major offered in your colleged. The rating of the overall quality of a textbook, on a scale from “excellent” to “poor”e. The type of transportation a person takes to school (e.g., bus, walk, car)f. The number of hours you study for a statistics examg. The rating of the overall quality of your campus coffee shop, on a scale from “excellent” to “poor”C4. For each of the variables in Exercise 3 that you classified as interval-ratio, identify whether it is discrete or continuous
Suppose that the correlation between height and IQ in children is +0.70. What proportion (or percent) of the variability in IQ can be explained by the relationship with height? Select one: a. 44% b. 51% c. 70% d. 49%
The correlation between midterm and final grades for 300 students is 0.620. If 5 points are added to each midterm grade, the new r will be: a. 0.124 b. 0.57 c. 0.62 d. 0.744
(b) How many rats learned the maze in four trials or less?
You want to conduct a study on the proportion of Penn State students who miss class when it is raining. Suppose here is the data you collect for students who live on-campus versus students who live off-campus: Never Miss Sometimes Miss Always Miss On-Campus 20 12 13 Off-Campus 45 14 22 a. For on-campus students (only), estimate the true difference in proportions for those who never miss class versus those who always miss class, when it is raining. Place a bound on the error of estimation. b. Estimate the true difference between the proportions of on-campus students who always miss class versus the proportion of off-campus students who always miss class, when it is raining. Place a bound on the error of estimation.
For the following example indicate the type of data involved using the following: A = nominal data B = ordinal data C = interval data 1. Number of patients with coronary pathology in nursing homes in the U.S

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The flights of stairs was measured in this study based on participants reporting the number of stairs they took yesterday. Which of the following describes the scale of measurement of this variable?