Question 1147233: 1) Rearrange the formula to find the number of days the barrister works in terms of s, c and T. If T = 32520, s = 13 and c = 18 then find b.
2) When and where we use Mean, Median, Mode, G.M and H.M?
3) Twister & Co, a local legal firm has calculated the cost of taking on a case for a client. The total cost £T of legal action is given by: T = 1780 b + 296 s + 64 c, where b is the number of days a barrister is used, s is the number of days a solicitor is used and c is the number of days a clerk is used.
4) The correlation between salaries of school teachers and amount of liquor sold during the period 1940 - 1980 was found to be 0.96, explain its business meaning.
5) Find out the regression coefficients of Y on X and of X on Y on the basis of following data:
Σ X = 50, Mean of X = 5, ΣY = 60, Mean of Y = 6, Σ XY = 350 Variance of X = 4, Var of Y = 9
6) Find the regression equation of X on Y and Yon X and the coefficient of correlation from the following data: ΣX = 60, ΣY = 40, ΣXY = 1150, ΣX 2 = 4160, ΣY 2 = 1720 and n = 10.
7) A petrol station sold 55,000 gallons of unleaded petrol in one week. The three types of fuel sold by the petrol station were in the proportion of: Super unleaded petrol 23% unleaded petrol 48% Diesel 29%
a) Calculate the total sales of fuel in that week.
b) Draw a pie chart which shows the sales of the above types of fuel.
c) How much unleaded petrol was sold?
d) How much diesel was sold?
8) The total sales of Dell Laptops from Jan 2013 to July 2014 is 3528450 determine the per month sales of laptops during the given time period
9) Find the total cost if the barrister works for 27 days, the solicitor works for 18 days and the clerk works for 59 days.
10) The table below shows the distribution of salaries of employees in Dun ford and Sons. SALARY RANGE & NO. OF EMPLOYEES
Salary range 5,000-9,999 10,000-14,999 15,000-19,999 20,000-24,999 25,000-29,999 30,000-34,999 35,000+
No. of Employees
56
134
292
149
127
38
25
a) Make the necessary calculations and draw a cumulative frequency.
b) Calculate the number of managers, given that senior managers’ salaries are £30,000 and above, and middle managers’ salaries are greater than £20,000.
c) Calculate the ratio of senior managers to middle managers.
d) Calculate the percentage of the workforce which are not senior or middle managers (i.e. other employees).
e) What is the probability of approaching any employee and finding that they are a manager?
f) i- What is the Median & Model value of the salary range also comments on shape of Distribution?
Answer by ikleyn(52778)   (Show Source):
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