4. A city directory, 4 years old, lists the addresses in order along each street, and gives the names of the persons living at each address. For a current interview survey of the people in the city , what are deficiencies of this frame ? Can they be remedied by the interviewers during the course of the field work? In using the directory, would you draw a list of addresses (dwelling places ) or a list of persons ? 5. In estimating by sampling the actual value of the small items in the inventory of a large firm , the actual and the book value were recorded for each item in the sample . For the total sample, the ratio of actual to book value was 1.021, this estimate being approximately normally distributed with a standard error of 0.0082 . If the book value of the inventory is $80,000, compute 95% confidence limits for the actual value. 6. In a population with N = 6 the values of y; are 8, 3, 1, 11, 4, and 7. Calculate the sample mean # for all possible simple random samples of size 2. Verify that of is an unbiased estimate of Y and that its variance is as given in $2 V (#) (1 - f )