MGSC 291-Exam 1 – Flashcards

The branch of statistical statistics called descriptive statistics summarizes important aspects of a data set. True/False

The branch of statistical data called inferential statistics refers to drawing conclusions about sample data by analyzing the corresponding population. True/False

The two branches of the study of statistics are generally referred to as _____________________.

The teachers union in California wants to know the average salary for high school teachers throughout the country. What will the teachers union presumably calculate? A. sample statistic B. Sample Parameter C. Population Statistic D. Population Parameter

Which of the following is an example of cross-sectional data? A. GDP of the United States from 1990-2010 B. Daily price of DuPont stock during the first quarter C. Quarterly housing starts collected over the last 60 years D. Results of market research testing consumer preferences fro soda

Which of the following is an example of time series data? A. The sales price of townhouses sold last year B. Quarterly housing starts collected over the last 60 years C. Results of market research testing consumer preferences for soda D. Starting salaries of recent business graduates at Penn State University

It came as a big surprise when Apple's touch screen iPhone 4, considered by many to be the best smartphone ever, was found to have a problem (The New York Times, June 24, 2010). Users complained of weak reception, and sometimes even dropped calls, when they cradled the phone in their hands in a particular way. A quick survey at a local store found that 2% of iPhone 4 users experienced this reception problem. a. State whether the following statement is true or false. The population is all iPhone 4 users b. Does 2% denote the population parameter or the sample statistic?

An accounting professor wants to know the average GPA of the students enrolled in her class. She looks up information on Blackboard about the students enrolled in her class and computes the average GPA as 3.29. a. State whether the following statement is true or false. The population is all students enrolled in the accounting class. b. Does the value 3.29 represent the population parameter or the sample statistic?

Which of the following variables are qualitative and which are quantitative? If the variable is quantitative, then specify whether the variable is discrete or continuous. a. Points scored in a football game. Qualitative Quantitative; discrete Quantitative; continuous b. Racial composition of a high school classroom. Qualitative Quantitative; discrete Quantitative; continuous c. Heights of 15-year-olds. Qualitative Quantitative; discrete Quantitative; continuous

In each of the following scenarios, define the type of measurement scale. 1. A kindergarten teacher marks whether each student is a boy or a girl. a. Ratio b.Nominal c.Interval d.Ordinal 2. A ski resort records the daily temperature during the month of January. a.Ratio b. Nominal c. Interval d.Ordinal 3. A restaurant surveys its customers about the quality of its waiting staff on a scale of 1 to 4, where 1 is poor and 4 is excellent. a.Ratio b.Nominal c.Interval d.Ordinal

A recent poll of 3,124 individuals asked: "What's the longest vacation you plan to take this summer?" The following relative frequency distribution summarizes the results. Response Relative Frequency A few days 36% A few long weekends 18% One week 16% Two weeks 30% Construct a frequency distribution of these data. (Round your answers to the nearest whole number.)