Are the grades one receives in a course related to the amount of time spent stud

Question

Are the grades one receives in a course related to the amount of time spent studying the subject? To analyze this possibility, a student took a random sample of 60 students who had enrolled in an accounting class last semester. She asked each student to report his or her grade in the course and the total number of hours spent studying accounting. The data are stored in this Excel file. (Data Below)

Question 2. What is the correlation r between time spent studying and course grade? (Use 3 decimal places)

ANS: .7475

Question 3. What is the slope of the least squares line, where x is the time spent studying and y is the course grade? (Use 3 decimal places in your answer)

ANS: 1.114

Question 4. How many points would a student's course grade increase if the student studied an additional 2 hours? (Use 2 decimal places in your answer)

ANS: 2.23

Question 5. If a students wants to increase her grade by 5 points, how many additional hours should she study? (Use 2 decimal places in your answer)

(NEED THIS ANSWER) (ONLY QUESTION I'M CONFUSED ON)

Time Marks 19 57 24 64 20 53 20 47 28 62 38 83 27 57 11 45 39 83 18 63 29 60 13 41 24 54 38 75 27 61 29 75 16 56 23 60 39 62 33 63 17 54 26 54 15 53 30 46 35 94 16 65 16 50 21 68 14 35 22 63 17 49 39 77 11 47 26 64 18 67 32 72 17 71 29 74 23 66 31 81 29 59 13 47 30 73 14 47 33 73 18 56 38 82 23 77 34 73 34 70 11 34 29 72 33 76 16 50 23 71 20 46 10 56 32 63 38 74 28 63

Explanation / Answer

from above given values derived slope is amount of marks increased for per unit study Hours.

therefore additional hours she should study to increase 5 marks =5/1.114=4.49 Hours

please revert for any clarification required.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.