Kindly help me to calculate this thank you..

Question 4 [20 marks] (a) A teacher claims that students in Accounting class put more hours studying compared to other students. The mean numbers of hour spent studying per week is 25 hours with a standard deviation of 3 home per week. A sample 012? Accounting class students was selected at random and the mean number of hours spent studying per week was found to be 26 hours. Determine the teacher's claim can be accepted at 5% significance level. (9 marks) (b) Iris makes snacks and sell them in a packet of 1009 each. Twelve randomly selected packets of snacks are taken and their weights in grams are recorded as follows: 98 102 98 100 96 91 97 97 100 94 101 97 Perform the required hypothesis test at 5% signicance level to check whether the mean weight per packet at snack is not equal to 1009. (11 marks) Page 3 of 7 CITY UNIVERSITY Date : 29'h April 2021 Course : BBQT2013 Business Statistics Question 5 [20 marks] The diameter oi the longest lichens growing on gravestones were measured. Age of gravestone Diameter of lichen (mm) 2 3 4 20 22 41 35 22 28 32 35 41 51 52 (3) Construct a linear regression model for the given data. (6 marks) (b) Interpret the relationship between age of gravestone and diameter of lichen. (4 marks) to) According to your model in part (a). estimate the diameter of lichen given an age of gravestone of 120 years. (3 marks) (d) Obtain the correlation coefficient value. (5 marks) is) Interpret the value of correlation coefcient. (2 marks)