Put the answers to the following questions on the blanks. 1. A survey regarding choices of colors of chairs in the lobby area is sent through email to all 5000 employees at a particular company. 30 people respond to the survey. a) What is the sample? (Include a number)________________________________ b) What is the population? (Include a number)________________________________ c) Would this sample be representative of the population? Yes or No 2. A sample of 100 professors at Collin College is randomly selected. The average of their yearly salaries is calculated.
a) What is the sample? (Include a number)________________________________ b) What is the population? (NOT a number)________________________________ c) Would this sample be representative of the population? Yes or No (Circle one) d) Is the salary for these 100 professors considered a statistic or a parameter? (Circle one) 3. Determine whether the study depicts an observational study or a designed experiment. a) A Cancer Research Group divided their 40 patients with lung cancer into two groups. One group received an experimental drug to fight cancer; the other group received a placebo.
After one year, the spread of cancer was measured. (Circle one)observational study or a designed experiment b) A study is conducted to determine if there is a relationship between breast cancer and breastfeeding. (Circle one)observational study or a designed experiment Math 1342page 2 Lab 1 – Chapter 1 4. Tell whether the following types of data are qualitative or quantitative. Then identify the quantitative data as continuous or discrete. Circle the correct category/categories. a) Weight of an uncut diamond qualitative or quantitative: discrete or continuous.
b) Brand name of a pair of running shoes qualitative or quantitative: discrete or continuous c) Number of students in a class qualitative or quantitative: discrete or continuous d) A person’s zip code qualitative or quantitative: discrete or continuous e) Grams of carbohydrates in a doughnut qualitative or quantitative: discrete or continuous f) Number of cookies in a box qualitative or quantitative: discrete or continuous 5. State the type of sampling used for each problem.
a) The Town of Poughkeepsie Police ran a sobriety checkpoint at which every fifth driver was stopped and interviewed._________________________ b) A News organization conducts an election day poll by randomly selecting voting precincts in New York, then interviewing all voters as they leave those precincts. ________________________________.
c) A professor surveyed all of his students to obtain sample data consisting of the number of credit cards students possess. ________________________________ d) In a study of college programs, students are randomly selected as follows: 8 from those majoring in communications, 14 from those majoring in business, and 7 from those majoring in history.