Single Variable Statistics

Which of the following best describes a population parameter?

• A numerical summary of a sample

• A numerical summary of a population

• A graphical representation of data

• A method of collecting data

What type of data is the number of students in a classroom?

• Categorical

• Quantitative

• Qualitative

• Nominal

Which of the following is an example of a discrete variable?

• The height of students

• The number of books on a shelf

• The time it takes to run a mile

• The temperature in a room

In a survey, 60% of respondents prefer coffee over tea. What is this percentage an example of?

• Frequency

• Relative frequency

• Joint frequency

• Marginal frequency

Which of the following best describes a simulation in statistics?

• A real-world experiment conducted to collect data

• A mathematical model used to predict outcomes

• A process of using random sampling to estimate probabilities

• A graphical representation of data

What is the main difference between a sample statistic and a population parameter?

• A sample statistic is a graphical representation, while a population parameter is a numerical summary.

• A sample statistic is always larger than a population parameter.

• A sample statistic is used for qualitative data, while a population parameter is used for quantitative data.

• A sample statistic is a numerical summary of a sample, while a population parameter is a numerical summary of a population.

What is the main advantage of using a frequency distribution table?

• To calculate the mean of the data

• To organize data for easier analysis

• To determine the mode of the data

• To display data in a graphical format

What is the main characteristic of a continuous variable?

• It can only take whole number values

• It can take any value within a given range

• It is always discrete

• It is always categorical

A random sample of 1000 college students in the United States is surveyed about how much money they spend on books per year, the mean amount is calculated. What is the population parameter?

• mean amount spent on textbooks by all college students in the US

• amount spent on textbooks by all college students

• mean amount spent on textbooks by all college students

• amount spent on textbooks by all college students in CA

The _________ (or one-sample) binomial test is used to compare a proportion of responses or values in a sample of data to a (hypothesized) proportion in the population from which our sample data are drawn

• double proportion

• single proportion

• exact test

• z-tests