1.1) (Ch. 7) Explain what a residual is (also known as residual of prediction).
2)
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e idea of “least squares” in regression (you need to fully read pp. 200-208 to understand).
3) What does it mean if b = 0?
4) What does it mean when r-squared is 0? What does it mean when r-squared is 1?
5) What is the difference in an unstandardized regression coefficient and the standardized regression coefficient?
6) If a report says test performance was predicted by number of cups of coffee (b = .94), what does the .94 mean? Interpret this. (For every one unit increase in ___,There is an increase in ___ )
7) If F (2,344) = 340.2, p < .001, then what is this saying in general about the regression model? (see p. 217)
8) Why should you be cautious in using unstandardized beta? (p. 218)
9) (Ch. 8) Explain partial correlation in your own words. In your explanation, explain how it is different from zero-order correlation (aka Pearson r).
10) (Ch. 9) What is the F statistic used to determine in multiple regression?
11) What is F when the null hypothesis is true?
12) In Table 9.4, which variable(s) are statistically significant predictors?
13) In Table 9.4, explain what it means if health motivation has b = .36 in terms of predicting number of exercise sessions per week.
14) What is the benefit of interpreting standardized beta weights? (see p. 264).
15) What happens if your predictor variables are too closely correlated?
16) Reflect on your learning. What has been the most difficult? How did you get through it? What concepts are still fuzzy to you? Is there anything you could share with me that would help me address how you learn best?
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6.I need help getting started with my C++ assignment.
This is the prompt of the assignment and guidelines must follow.
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delines must follow.
The purpose of this assignment is to give you practice using structs, using strings, writing functions and sorting. You will read a student file into an array of structs, determine grades, sort the array and print it out.
Program Steps and Requirements
Use the Student struct shown below.
Read the input file (partially shown below) and store the data in an array of structs. The input file contains 55 student records and one heading line.
Write code to determine the grade for each student. The grade determination is exactly as specified for this class in the syllabus. Remember to discard the lowest assignment grade.
Sort the array of student students in descending order by the total points.
Write the output file using the exact format shown below and include the two lines of headings in the output.
Required Student struct and named constants
const unsigned NumberOfStudents = 55;
const unsigned PointsPossible = 400;
const unsigned NumberOfAssignments = 10;
const unsigned NumberOfExercises = 10;
struct Student
{
int id;
string name;
int exercise[NumberOfExercises];
int assignment[NumberOfAssignments];
int midterm;
int final;
int codelab;
int exerciseTotal;
int assignmentTotal;
int totalPoints;
int percent;
string grade;
};
Input file
-StudId- -------Name-------- -----Exercises----- ---------Assignments--------- Mi Fin CL
12345678 Smartiepants, Sam 5 4 5 4 5 5 5 5 5 5 20 19 20 20 20 20 19 20 20 19 65 98 9
18519268 Mendoza, Victor 4 2 5 4 1 4 5 5 5 4 17 12 17 18 14 17 19 18 14 18 59 49 6
23276929 Chien, Shengfeng 2 3 0 4 4 5 2 5 5 2 9 18 15 8 19 18 18 16 19 13 64 89 8
18242679 Dhaliwal, Shawn 5 5 3 4 5 4 2 4 4 5 9 18 17 15 18 19 12 15 18 14 45 92 9
09869966 Miraftab, Mina 5 3 5 5 3 5 4 0 4 3 17 4 3 18 12 16 14 17 17 12 52 68 7
10930997 Dimas, Abraham 5 3 4 5 4 3 4 3 3 3 12 18 20 11 14 7 15 10 18 15 64 89 6
11545560 Masongsong, Mikhael 1 3 5 4 3 4 5 3 5 5 19 19 9 13 17 20 20 14 14 19 64 96 8
10626377 Zigler, Joshua 4 3 4 3 2 5 4 4 4 5 17 14 18 20 17 18 12 19 14 14 51 90 5
...
Output report file
Stud Id Name Ex Ass Mi Fin CL Tot Pct Gr
-------- ------------------- -- --- -- --- -- --- --- --
12345678 Smartiepants, Sam 48 178 65 98 9 398 100 A+
11545560 Masongsong, Mikhael 38 155 64 96 8 361 90 A-
20767544 Martins, Gustavo 40 144 67 97 10 358 90 A-
23305464 Zumwalt, Jacob 37 160 62 90 8 357 89 B+
23579439 Feirstein, Berent 42 159 55 91 9 356 89 B+
14965959 Ho, Brandon 40 157 66 84 8 355 89 B+
19988142 Wang, Lu 31 157 58 98 9 353 88 B+
09559062 Mora, Gabriel 36 137 67 100 7 347 87 B
19108176 Bailey, Tanequa 44 152 56 85 8 345 86 B
Suggested main function
int main()
{
Student students[NumberOfStudents];
getStudentDataFromFile(students, InputFilename);
determineGrades(students);
sort(students);
printStudentDataToFile(students,OutputFilename);
}
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9.answer the questions an help me pleaseeee
Question 7: summarise the results of your phagocytosis assay, comparing the differences, if any,
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say, comparing the differences, if any, between what you observe for cells with beads A and cells with beads B.
beads A x10 objective:
beads A x25 objective
beads B x10 objective
beads B x25 objective
Question 8 [short Text answer]
Marked out of 15.0
Using either your own cells with beads A or B, or the online images of the same, calculate a phagocytosis index for each treatment. Give the numbers of cells counted, numbers of beads etc and the final PI numbers as mentioned in the practical handout.
Question 9 [Text answer: Up to 250 words]
Marked out of 15.0
Beads A are clean beads , whereas beads B were pre-coated in surface layer of mouse immunoglobulin G (IgG). What differences might you expect (whether your experiment worked or not) upon exposing the mouse RAW 264.7 macrophages cells to these different beads. (do not give a mechanistic reason for it here, just what you might expect to happen)
Question 10 [Text answer: up to 250 words]
Marked out of 15.0
What immunological mechanism(s) might be involved in altering phagocytosis given your knowledge of the beads and cells, irrespective of whether you saw in your own experiment?
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10.I was wondering if you could help me with some Linear Motion Physics Problems. For the first question, I completed
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n, I completed parts A and B, but can't get C. We get all the answers to the questions but not how to get to the answer. The question is:
Patrick changes velocity from 2.0 m/s North to 4.0 m/s South with an acceleration of 0.50 m/s/s South. (A) Determine how much time this process takes (ANSWER: 12 s). (B) Find his displacement (magnitude and direction) (ANSWER: 12 m South). (C) Find how much distance Patrick covered (ANSWER: 20 m).
Another question I was having trouble with was this (I got part A but not parts B or C):
Two cars are traveling along a straight line in the same direction, the lead car at 25.0 m/s and the other car at 30.0 m/s. At the moment the cars are 40.0 m apart, the lead driver applies the brakes, causing his car to have an acceleration of -2.00 m/s/s. (A) How long does it take for the lead car to stop? (ANSWER: 12.5 s). (B) Assuming that the chasing car brakes at the same time as the lead car, what must be the chasing car's minimum negative acceleration so as not to hit the lead car? (ANSWER: -2.29 m/s/s). (C) How long does it take for the chasing car to stop? (ANSWER: 13.1 s).
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