9.The scatterplot shows the number of absencesin a week for classes of different sizes. Trevorconcluded that there is a positive correlationbetween class size and the number of absences.School AbsencesNumber ofAbsences12108642Which statement best describes why Trevor'sconclusion was incorrect?15 20 25 30 35 40Class SizeA. The largest class does not have the mostabsences.B. The smallest class does not have the leastnumber of absences.C. The data show no relationship between classsize and number of absences.WhichD. The data show a negative relationship betweenclass size and number of absences.ta will11. This sbetweA. spinB.COagD. dis

The scatterplot is given by: The conclusion given by Trevor is that "There is a positive…

Answered: The scatterplot shows the number of…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A campus survey asked 750 university students which meal (breakfast, lunch, dinner) they ordered the most often from the school cafeteria. A.) What is the variable? - is it Meal? B.) What kind of variable is it? - is it ordinal? C.) What is the population of this study? Is it descriptive statistics?
Q.2) A manager at the delivery company recorded the mean and median delivery cost, but unfortunately lost the paper on which the values were recorded. However, the manager can remember that one value was about $4.00 and the other was about $4.40. Which value is the mean and which is the median? i. $4.00 is the mean and $4.40 is the median. ii. ii. $4.40 is the mean and $4.00 is the median. iii. It's impossible to tell which is which. 111. Q.3) Which of the following sets of four numbers has the largest standard deviation? (а) 100, 101, 102, 103 (b) 7, 8, 9, 10 (с) 5, 5, 5, 5 (d) 0, 1, 2, 3 (e) 0, 0, 10, 10
An industrial-organizational psychologist is interested in discovering the relationship between the tempo of preferred music that is played in a workplace and employee mood. Employees chose their favorite song on an MP3 player and then reported their moods when listening to that piece of music. A total of 10 participants were asked individually and brought in their own MP3 players; the least number of songs on an employee's MP3 player was 350. The sample data are presented as a scatterplot below. The psychologist wants to use a Pearson correlation coefficient to analyze the relationship. Considering the assumptions for this statistic, which of these statements is the correct course of action? A. The researcher has chosen the wrong statistic to represent this relationship. B. The researcher has violated a robust assumption and should be able to calculate r. C. The researcher has chosen the right statistic because all the assumptions are valid. D. The researcher has violated a…
pls answer thankyou
Psychologists have been investigating the differences between people with at least one brother or sister and those with none. In a letter to the New England Jounal of Medicine, researchers announced the results of a survey of 472 adults in Buffalo, New York. The experiment recorded whether the respondent suffered from hypertension and whether she or he had siblings. The data were summarized as shown bellow; SIBLING NO SIBLING TOTAL Suffer from hypertention 79 39 118 Do not suffer from hypertension 262 92 354 TOTAL 341 131 472 REQUIRED Do these data allow us to conclude at the 5% significance level that adults with no siblings suffer different rates of hypertension than those with siblings?
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean Test Score Number of ninth graders (Frequency) Glenwood 79 279 Central 94 349 Lincoln 70 161 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 79, 94, and 70, which is 81. Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. Mean of all ninth grader's Scores =
A matched-pair case-control study was conducted in order to assess if there is a relationship between serum Vitamin D levels and migraine headaches. The results are shown below: Control Control With migraine No Migraine 22 49 (Case) High Vitamin D (Case) Low Vitamin D 36 18 What would be the total number of participants with migraine after we unmatched the pairs? Answer should be in numerical form. Avoid extra spaces before and after your answers. Answer should be a whole number; no decimal points.
Use Grade 12 Data Management Beginner
uction. Solve the following problem. A math class of 20 students had their had their chapter test. The following are the scores of 20 the students: 16, 27, 25, 46, 22, 43, 39, 43, 43, 49, 34, 22, 35, 27, 25, 22, 30, 29, 26, 37. Compute for its mean, median, and mode.
Use the table to answer the question. Has a Cell Phone Does Not Have a Cell Phone Totals Has a Computer 44 176 220 Does Not Have a Computer 26 104 130 Totals 70 280 350 The table above gives a summary of survey data asking respondents if they owned a computer or a cell phone. Is there an association between owning a computer and owning a cell phone? Explain, rounding your answer to the nearest whole percent as necessary. There is an association since the conditional relative frequencies of owning a cell phone are 20% for those who own computers and those who do not. There is not an association since the conditional relative frequencies of owning a cell phone are 20% for those who own computers and those who do not. There is not an association since the conditional relative frequency of owning a cell phone is 63% for those who own computers and 37% for those who do not. There is an association since the conditional relative frequency of…

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