The last page is the formulas you need to solve the questions .

11) The recursive formula to = 2ta-1 - In# defines a sequence of numbers. Find the next three terms in the sequence given that the initial values are t = 2 and u = 4. (3 marks) 12) A magazine company is conducting a survey for 5000 customers. The company will only sample 100 customers. What is the sampling interval for this situation? (2 marks) Scanned with CamScanner 13) For the following set of data: 13 3 3 4 5 5 6 7 8 9 10 Calculate the: 1) mean (1 mark) b) median (1 mark) c) mode (I mark) d) standard deviation (2 marks)10 The following sable shows data for full-time employers of a smill company 8 of 8 Annual Income (004) 33 Find the equation of bru fit for this down. (4 maria) Scanned with CamScanner ROUGED TEST #1 -FORMULA SHEET Interval Popularian star n - the number of values in a sample Standard deviation im Covariance Sy Ex-Dty -y Equation Sne of bel it yoash buy-ai First quartile (Qi) -the median of the lower half of the dora Third quartile (Q3 - the median of the upper half of the dats Interquartile range = Q -Q Soul -laterquartile range = " (Q) -Q1) Scanned with CamScanner5 of 8 14) Given the following datas 3 10 5 1 15 5 16 6 9 12 3 30 2 10 7 Determine the first quartile (Qu), the third quartile (Q1% the interquartile range and the semi-interquartile range, (4 marks) Scanned with CamScanner 15) The following is data for the bours studied by students and the exam scores they received on their exams! Hours studied Fram spose 67 93 a) Create a seaher plot of hours madied versus exam score. Classify the linear comelation. (mark) by Solve Septthe covariance of x and yo for this data. (4 marks)