Let's address each part of the question step by step. Part A: Sampling Frame The sampling frame used in this example is 2014 driver's license records. Part B: Conjecture Made by the Local Telephone Company The conjecture made by the local telephone company is that the proportion of individuals with a landline telephone service has decreased. Part C: Sampling Distribution Description Given: Sample size, = 411 n=411 Proportion from 2012, = 0.662 p=0.662 Now, let's calculate: Mean of the sampling distribution of sample proportion ( ^ p ^ ): ^ = = 0.662 p ^ =p=0.662 Standard deviation of the sampling distribution of sample proportion ( ^ p ^ ): ^ = ( 1 ) = 0.662 ( 1 0.662 ) 411 0.0234 p ^ = n p(1p) = 411 0.662(10.662) 0.0234 Shape: The sampling distribution of the sample proportion is approximately normal due to the central limit theorem, given a large sample size. Checks: = 411 0.662 272.382 and ( 1 ) = 411 ( 1 0.662 ) 138.618 np=4110.662272.382andn(1p)=411(10.662)138.618 Both conditions are satisfied for using the normal approximation. Part D: Sample Proportion Calculation When 253 out of 411 US adults still have landline telephone service: ^ = 253 411 0.6151 p ^ = 411 253 0.6151 Part E: Probability Calculation To find the probability of observing 253 or fewer adults with landline telephone service: Calculate th