Exam 1: Statistics, Data, and Statistical Thinking

Define statistical thinking.

In one study of the moral of companyʹs employees, 10 employees were randomly chosen from each of the departments within the company. Identify the sampling design used.

Which type of problem has occurred when inaccuracies exist in the values of the data recorded?

The average age of the students in a statistics class is 22 years. Does this statement describe descriptive or inferential statistics?

The way in which an interviewer asks a question about political party affiliation causes respondents to answer that they have no affiliation when they actually do. What type of problem Has occurred?

Measurement is the process of assigning numbers to variables of individual population units.

A county planning commission is attempted to survey 1500 households from the counties 400,000 households. A random sample was selected and surveys were mailed to the randomly selected Households, but only 1075 were returned. The inability to collect data from the 425 households that Didnʹt return the survey would be considered which type of sampling problem?

The amount of television viewed by todayʹs youth is of primary concern to Parents Against Watching Television (PAWT). 330 parents of elementary school-aged children were asked to Estimate the number of hours per week that their child watches television. Identify how the data Were collected in this study.

As part of an economics class project, students were asked to randomly select 500 New York 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. What type of Variable is being collected?

As part of an economics class project, students were asked to randomly select 500 New York 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 sample Of interest for this study.

A middle school was interested in surveying their students to find out opinions about the schools media center. To facilitate data collection, the homeroom period was extended 30 minutes to allow Everyone in the school ample time to respond to a short questionnaire. Unfortunately, it was Learned after the surveys had been completed that all honors students in the middle school were On an all-day field trip and away from school for the entire day. The exclusion of their input into The survey would be considered which type of sampling problem?

What method of data collection would you use to collect data for a study where a drug was given to 95 patients and a placebo to another group of 95 patients to determine if the drug has an effect On a patientʹs illness?

A study attempted to estimate the proportion of Florida residents who were willing to spend more tax dollars on protecting the Florida beaches from environmental disasters. Twenty-two hundred Florida residents were surveyed.Which of the following describes the variable of interest in the Study?

Which of the following is not an element of descriptive statistical problems?

From past figures, it is predicted that 30% of the registered voters will vote in the March primary. Does this statement describe descriptive or inferential statistics?

As part of an economics class project, students were asked to randomly select 500 New York 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 data Collection method used in this study.

When using data from a published source, it is not important to know how the data were collected and whether randomization was used.

A university was interested in student reaction to a proposal to spend more on athletic scholarships and less on academic scholarships. 35 student athletes were surveyed. What type of Problem has occurred?

As part of an economics class project, students were asked to randomly select 500 New York 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 Population of interest for 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 110 students and recorded how long it took each of them to find a parking spot. Identify the population, sample, and variable of interest to the administrators.