1. Use F₄₀ = 63 ; 245 ; 986 and F₃₈ = 39 ; 088 ; 169 to find the value of F_39. Show your reasoning.

2. Using the Binets formula, calculate F₄.

3. A research objective is presented. For each,identify the (a)population and (b) sample in the study.

(a) A polling organization contacts 2141 male university graduates who have a white-collar job and asks whether or not they had received a raise at work during the past 4 months. (b) A quality-control manager randomly selects 70 bottles of ketchup that were filled on July 17 to assess the calibration of the filling machine$.

(c) Every year the PSA releases the Current Population Report based on a survey of 50,000 households. The goal of this report is to learn the demographic characteristics, such as income, of all households within the Philippines.

4. Determine the type of sampling used.

(a) A member of Congress wishes to determine her constituents opinion regarding estate taxes. She divides her constituency into three income classes: low-income households, middle-income households, and upper-income households. She then takes a simple random sample of house- holds from each income class.

(b) A college official divides the student population into five classes: freshman, sophomore, junior, senior, and graduate student. The official takes a simple random sample from each class and asks the members opinions regarding student services.

(c) The presider of a guest-lecture series at a university stands outside the auditorium before a lecture begins and hands every fifth person who arrives, beginning with the third, a speaker evaluation survey to be completed and returned at the end of the program.

(d) To determine his DSL Internet connection speed, Shawn divides up the day into four parts: morning, midday, evening, and late night. He then measures his Internet connection speed at 5 randomly selected times during each part of the day.

(e) 24 Hour Fitness wants to administer a satisfaction survey to its current members. Using its membership roster, the club randomly selects 40 club members and asks them about their level of satisfaction with the club.