Question

6/8 Section C [20%) You must now answer ALL parts of question 6. As before, please use a new WHITE answer sheet. If there is not enough space on the white sheet, please raise your hand to request a YELLOW answer sheet in order to continue your answer. 6. A researcher asked 7 people on Byres Road how many hours they spent watching TV last Sunday. The table below shows the answers. Sunday-TV (hours) a) Calculate the mean of the Sunday-TV hours. Explain your calculations. b) Calculate the median time spent watching TV. Explain your calculations. c) Find the first quartile for Sunday-TV hours. Explain your calculations. d) Calculate the variance of Sunday-TV hours. Explain your calculations. e) Calculate the standard deviation of Sunday-TV hours. Explain your calculations A researcher decided to conduct a study on the relationship between a sedentary lifestyle and cholesterol levels. To carry out the analysis, the researcher recruited 100 healthy male participants between the ages of 45 and 65 years old. The amount of time spent watching TV (time tv) and cholesterol concentration (cholesterol) were recorded for all 100 participants. Estimating regression equation cholesterola. Btime_tv where: cholesterol is the cholesterol concentration measured in mmol/L

Answer 1

This question is simply formula based question if you remember the formula you can easily solve this question, I have solved this with formula given in the following image.

PAGE :- odd. Here number of So, the tormula observation is for medion is =mti th term 2 Here n=7 - 7+1 =4th term we len see that 4th term is 12 Hence the median is 2. (c) Divide Parts. the Quartiles 4 flud Distribution into We Can bulite the info each warlik number of observation by using formula 5 mtu 9 - Hence 7+1 = 2nd form the first partile is lhoun.

(a) The meen of is given by Sunday TV hours 18 and Calwlated as where - na total Number of enteries Exiz Summation of Induidual Entry m(7) مر + UWP PO- Mz7 X= 3+1 +5 tot 2+ 1+2. (b) median time spent on watching TV. for lelwlating medion we need to arrange the X im I Ascending order. ( Oq 1, 1, 2, 2, 3, 5

(1) variance of Sunday TV watching formula for calculating variance is end is Denoted b Here Xi - Individual observation Xe mean of Distribution X=2 Elxi-2) (0-2) +1–21-2)+(2-2) † (1-2) +3-2)(52) 7 utltlto tot it 9 = 16 (e) Standard 62 deviction = 6 is simly given by = 16 -

NOTE: THE UNIT OF OBSERVATIONS HERE IS IN HOURS SO THE UNIT OF EVERY ANSWER IS HOUR.