Stats, Chapter 1 Practice Test
Determine if the survey question is biased. If the question is biased, suggest a better wording. How often do you eat ice cream during an average week week? 1. Is the question biased? Choose the best question below.
1 No, because it does not lead the respondent to any particular answer. 2 The original question is not biased.
In a poll, 1,005 women in a country were asked whether they favor or oppose the use of "federal tax dollars to fund medical research using stem cells obtained from human embryos." Among the respondents, 48% said that they were in favor. Describe the statistical study. 1. What is the population in the given problem? Choose the correct answer below. 2. Identify the sample for the given problem. Choose the correct answer below.
1. All women in the country 2. The 1,005 women selected
The region of a country with the highest per capita income of a country for the past six years is shown below. Northeast Eastern Southeast Northern Northwest Western Determine whether the data are qualitative or quantitative and identify the data set's level of measurement. 1. Are the data qualitative or quantitative? 2. What is the data set's level of measurement?
1. Qualitative 2. Nominal (bc not ranked and not numbers)
The following appear on a physician's intake form. Identify the level of measurement of the data. (a) Weight (b)Temperature (c)Marital status (d) Happiness level(scale of 0 to 10) 1. What is the level of measurement for Weight? 2. What is the level of measurement for "Temperature"? 3. What is the level of measurement for "Marital status"? 4. What is the level of measurement for Happiness level (0-10)?
1. Ratio 2. Interval 3. Nominal 4. Ordinal
Identify the sampling techniques used, and discuss potential sources of bias (if any). Explain. Alfalfa is planted on a 49-acre field. The field is divided into one-acre subplots. A sample is taken from each subplot to estimate the harvest. 1 What type of sampling is used? 2 What potential sources of bias are present, if any? Select all that apply.
1. Stratified sampling is used, since the field is divided into subplots and a random sample is taken from each subplot. 2. Certain subplots may have more or fewer alfalfaalfalfa plants than others. Samples from these subplots may bias the overall sample.
Determine whether the given value is a statistic or a parameter. In a study of all 2699 seniors at a college comma it is found that 25 % own a vehicle.In a study of all 2699 seniors at a college, it is found that 25% own a vehicle.
Parameter because the value is a numerical measurement describing a characteristic of a populationpopulation.
Determine whether the data set is a population or a sample. Explain your reasoning. The height of each student in a classroom.
Population, because it is a collection of heights for all students in the classroom.heights for all students in the classroom.
Determine whether you would take a census or use a sampling to collect data for the study described below. The most popular grocery store among themost popular grocery store among the 50 comma 00050,000 employees of a company.
Sampling (CORRECT) Census
