A) you bought jeans last week for $55. today you see that the jeans are on sale for $40. what is the percent decrease of the price?
b) your pay increased from $230 to $250 per week. what is the percent increase of your weekly pay?

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain