A stratified simple random sample was taken with the following results. Excel File: data21-07.xls Stratum () 1 138 30 0.50 200 20 2 103 25 0.78 250 30 3 210 50 0.21 100 25 a. Develop an estimate of the population mean for each stratum. Stratum 138 Stratum 103 Stratum 210 b. Develop an approximate confidence interval for the population mean in each stratum (to 4 decimals). Stratum to Stratum to Stratum to c. Develop an approximate confidence interval for the overall population mean (to 4 decimals). to

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?