Q # 3:(10 marks)

Question 03:

a.What is the difference between symmetric and standard symmetric distributions? [1-Mark]

b.A statistical analysis of 1000 long-distance telephone calls made from the headquarters of PTCL, indicated that the length of these calls is normally distributed with seconds and seconds.

i. Find the proportion of a particular call lasted between 180 and 300 seconds.[3-Marks]

ii. What is the length of a particular call if 1% of all calls are shorter?[3-Marks]

c.The average cost of a certain type of seed per acre is $42. The standard deviation is $3. Use Chebyshev's rule to find out the range in which at least 89% of the seed values will fall.

Note: write the answer in each part

Course Title:Applied Statistics

Course Code: GS 301