QMET 251 MIDTERM EXAM 2025

The portion of the population that is selected for analysis is called -Correct Ans-a sample A summary measure that is computed from only a sample of the population is called Correct Ans-a statistic The height of an individual is an example of a -Correct Ans-continuous variable The body style of an automobile (sedan, minivan, SUV, and so on) is an example of a Correct Ans-categorical variable The number of credit cards in a person's wallet is an example of a -Correct Ans-discrete variable Statistical inference occurs when you -Correct Ans-take the results of a sample and reach conclusions about a population The Human Resources director of a large corporation wants to develop a dental benefits package and decides to select 100 employees from a list of all 5,000 workers in order to study their preferences for the various components of a potential package. All the employees in the corporation constitute the ______. -Correct Ans-population The Human Resources director of a large corporation wants to develop a dental benefits package and decides to select 100 employees from a list of all 5,000 workers in order to study their preferences for the various components of a potential package. The 100 employees who will participate in this study constitute the ______. -Correct Ans sample Those methods that involve collecting, presenting, and computing characteristics of a set data in order to properly describe the various features of the data are called: Correct Ans-descriptive statistics Based on the results of a poll of 500 registered voters, the conclusion that the Democratic candidate for U.S. president will win the upcoming election is an example of: -Correct Ans-inferential statistics A numerical measure that is computed to describe a characteristic of an entire population is called: -Correct Ans-a parameter You were working on a project to examine the value of the American dollar as compared to the English pound. You accessed an Internet site where you obtained this QMET 251 QMET 251 information for the past 50 years. Which method of data collection were you using? Correct Ans-published sources The number of teachers employed at your local elementary school is an example of a _________ variable. -Correct Ans-discrete The temperature at which a hamburger is cooked at a brunch of a fast-food chain is an example of a _____ variable. -Correct Ans-continuous The number of cell phones in a household is an example of: -Correct Ans-a discrete variable T/F: The possible responses to the question, "How long have you been living at your current residence?" are values from a continuous variable. -Correct Ans-true T/F: The possible responses to the question, "How many times in the past seven days have you streamed a movie or TV show online?" are values from a discrete variable. Correct Ans-true An insurance company evaluates many variables about a person before deciding on an appropriate rate for automobile insurance. The number of accidents a person has had in the past 3 years is an example of a _____ variable. -Correct Ans-discrete The distance a person drives in a day is an example of a ________ variable. -Correct Ans-continuous A persons martial status is an example of a ______ variable. -Correct Ans-categorical A numerical measure that is computed from only a sample of the population is called a ______. -Correct Ans-statistic The portion of the population that is selected for analysis is called the ______. -Correct Ans-sample A college admission application includes many variables. The number of advanced placement courses the student has taken is an example of a _______ variable. -Correct Ans-discrete A college admission application includes many variables. The gender of the student is an example of a ______ variable. -Correct Ans-categorical The distance from the student's home to the college is an example of a _______ variable. -Correct Ans-continuous Which of the following graphical presentations is NOT appropriate for categorical data? a. Pareto chart QMET 251 QMET 251 b. scatter plot c. bar chart d. pie chart -Correct Ans-scatter plot Which of the following graphical presentations is NOT. appropriate for numerical data? a. histogram b. pie chart c. time-series plot d. scatter plot -Correct Ans-pie chart A type of histogram in which the categories are plotted in the descending rank order of the magnitude of their frequencies is called a: -Correct Ans-Pareto chart A _____ chart would best show that the total of all the categories sums to 100%. Correct Ans-pie chart The basic principle behind the _______ is the capability to separate the vital few categories from the trivial many categories. -Correct Ans-Pareto chart When studying the simultaneous responses to two categorical variables, you should construct a: -Correct Ans-cross-classification table In a cross-classification table, the number of rows and columns: a. must always be the same b. must always be 2 c. must add to 100% d. none of the above -Correct Ans-none of the above T/F: Histograms are used for numerical data, whereas bar charts are suitable for categorical data. -Correct Ans-true T/F: a website monitors customer complaints and organizes these complaints into six distinct categories. Over the past year, the company has received 534 complaints. One possible graphical method for representing these data is a Pareto Chart. -Correct Ans true T/F: a website monitors customer complaints and organizes these complaints into six distinct categories. Over the past year, the company has received 534 complaints. One possible graphical method for representing these data is a scatter plot. -Correct Ans false T/F: A social media website collected information on the age of its customers. The youngest customer was 5 and the oldest was 96. To study the distribution of the age of its customers, the company should use a pie chart. -Correct Ans-False QMET 251 QMET 251 T/F: A social media website collected information on the age of its customers. The youngest customer was 5 and the oldest was 96. To study the distribution of the age of its customers, the company can use a histogram. -Correct Ans-true T/F: A website wants to collect information on the daily number of visitors. To study the daily number of visitors, it can use a pie chart. -Correct Ans-False T/F: A website wants to collect information on the daily number of visitors. To study the daily number of visitors, it can use a time-series plot. -Correct Ans-true T/F: A professor wants to study the relationship between the number of hours a student studied for an exam and the exam score achieved. The professor can use a time-series plot. -Correct Ans-False T/F: A professor wants to study the relationship between the number of hours a student studied for an exam and the exam score achieved. The professor can use a bar chart. Correct Ans-False T/F: A professor wants to study the relationship between the number of hours a student studied for an exam and the exam score achieved. The professor can use a scatter plot. -Correct Ans-True T/F: if you wanted to compare the percentage of items that are in a particular category as compared to other categories, you should use a pie chart, not a bar chart. -Correct Ans-False To evaluate two categorical variables at the same time, a _____ should be developed. Correct Ans-Cross-classification table A ______ is a vertical bar chart in which the rectangular bars are constructed at the boundaries of each class interval. -Correct Ans-Histogram A _______ should be used when you are primarily concerned with the percentage of the total that is in each category. -Correct Ans-Pie chart A _____ chart should be used when you are primarily concerned with