Exam 1: Statistics, Data, and Statistical Thinking

Which of the following is not the job of a statistician?

A high school guidance counselor analyzed data from a sample of 100 community colleges throughout the United States. One of his goals was to estimate the annual tuition costs of community colleges in the United States. Describe the population and variable of interest to the guidance counselor.

A study attempted to estimate the proportion of Florida residents who were willing to spend more tax dollars on protecting the Florida coastline from environmental disasters. Thirty-nine hundred Florida residents were surveyed.Which of the following is the population used in the study?

Parking at a large university has become a very big problem. University administrators are interested in determining the average parking time (e.g. the time it takes a student to find a Parking spot)of its students. An administrator inconspicuously followed 250 students and Carefully recorded their parking times. Identify the sample of interest to the university Administration.

A measure of reliability is an important element of a descriptive statistical problem.

The amount of television viewed by todayʹs youth is of primary concern to Parents Against Watching Television (PAWT). 250 parents of elementary school-aged children were asked to Estimate the number of hours per week that their child watches television. Identify the type of data Collected by PAWT.

A watchdog group is investigating how people are treated during the foreclosure process. Surveys were mailed to a random sample of 300 people who had recently been threatened with foreclosure. 75 of the surveys were returned by the postal service because the intended recipients had moved And left no forwarding address. What type of problem has occurred?

What method of data collection would you use to collect data for a study where a political pollster wishes to determine if his candidate is leading in the polls?

A postal worker counts the number of complaint letters received by the United States Postal Service in a given day. Identify the type of data collected.

As part of an economics class project, students were asked to randomly select 500 New Your Stock Exchange (NYSE)stocks from the Wall Street Journal. As part of the project, students were asked To summarize the current prices (also referred to as the closing price of the stock for a particular Trading date)of the collected stocks using graphical and numerical techniques. Identify the Variable of interest for this study.

Parking at a large university has become a very big problem. University administrators are interested in determining the average parking time (e.g. the time it takes a student to find a Parking spot)of its students. An administrator inconspicuously followed 250 students and Carefully recorded their parking times. Identify the data collection method used by the Administration in this study.

What is statistics?

Because of the possible legal consequences, many people in a sample of the U.S. population chose not to participate in a survey regarding illegal drug use. What type of problem has occurred?

Does online teaching help or hinder student learning? To help answer this question, a statistics teacher decided to teach his three sections of a particular class using three different teaching Models - a traditional face-to-face section, a completely online section, and a hybrid or blended Section that incorporated both a face-to-face and online component in the section. Students were Randomly assigned to the different sections, taught identical information using the different Teaching formats, and given identical examinations to measure student learning. The goal was to Identify if the teaching method used affected student learning performance. Identify the data Collection method used in this study.

Parking at a university has become a problem. University administrators are interested in determining the average time it takes a student to find a parking spot. An administrator Inconspicuously followed 200 students and recorded how long it took each of them to find a Parking spot. Identify the variable of interest to the university administration.

Which of the following is not typically an element of inferential statistical problems?

What is the most common way to satisfy the representative sample requirement?