Question 2 A store is selling a shirt for $60 that has been discounted by 25% What was the original selling price? Not yet answered Marked out of 1.00 Flag question Select one: a. $110.5 b. $80 c. $70 d. $45A contact lens manufacturer is researching the curvature of the lenses it sells. The last 4000 lenses sold, in particular, had an average curvature of 0.6. What is the sample in this study? Select one: a. the 4000 lenses. b. 0.6 O c. the lenses sold today d. all the lenses sold by the manufacturerThe following Excel tables are obtained when "Score received on an exam (measured in percentage points)" is regressed on "percentage attendance" for 22 students in a Statistics for Business and Economics course. Regression Statistics Multiple R 0.142620229 R Square 0.02034053 Standard Error 20.25979924 Observations 22 Coefficients Standard Error T Stat P-value Intercept 39.39027309 37.24347659 1.057642216 0.30282662 Attendance 0.340583573 0.52852452 0.644404489 0.52663569 Estimate the "Score received on an exam" if "percentage attendance" student is 80 Select one: a. 39.6 b. 45.6 C. 66.6 d. 78.7Which one of these statistics is not affected by outliers? Select one: a. Interquartile range b. Mean c. Standard deviation d. RangeFind the second derivative of the function f(x)=5x (x+47) Select one: a. 30x - 470 b. 30x + 470 c. 15x + 235 O d. 15x + 470xThe water bills (in RM) for ten households in September are as follows: 88.90 79.00 65.50 54.90 132.60 32.10 45.70 87.70 98.00 112.00 Estimate the IQR of the water bills. Select one: a. RM57.10 b. RM43.10 c. RM33.00 O d. RM32.50Student 2 3 4 5 6 7 8 Number of days absent from class 2 5 11 13 18 20 26 32 Final examination marks 80 84 74 72 66 58 41 36 A teacher believes that the number of days a student was absent from the class will affect his/her final examination marks. To establish this relationship, the teacher took a random sample of 8 students from his class. based on data above, what is the value of the coefficient of determination? Select one: a. 0.968 b. -0.968 c. 0.937 O d. -0.032