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Heather Brett-Pickering 2018FA-MATH-1051H Assignment 2018-Assignment1 due 09/23/2018 at 11:59pm EDT 1. (1 point) Qualitative data: A. must be nonnumeric B. are labels used to identify attributes of elements C. indicate either how much or how many D. cannot be numeric In a questionnaire, respondents are asked to mark their gen- der as male or female. Gender is an example of a: A. quantitative variable B. qualitative or quantitative variable, depending on how the respondents answered the question C. qualitative variable D. None of the above answers is correct Correct Answers: B C 2. (1 point) You are doing a survey on UBC students. Par- ticipating students come from different majors and years. The participants are asked how much they pay for tuition this aca- demic year. What is the variable of interest? A. UBC students B. Major of a student C. Tuition fee paid by a student D. Study year of a student Correct Answers: C What type of variable is ” monthly rainfall in Vancouver ”? A. quantitative B. categorical C. none of the above Correct Answers: A 4. (1 point) A sample of 50 dentists from Vancouver is taken to estimate the median income of all Vancouver residents. This study includes a sample that is A. Non-representative B. Representative C. Cannot be determined Correct Answers: A Below is a list of numerical variables from an annual survey of university students. Numerical variables can be classified as discrete or continuous. Which variable is discrete? A. Number of textbooks purchased B. Annual tuition fees C. Monthly rent for student accommodation D. Total cost of textbooks E. Commuting distance to university (in kilometres) Solution: The answer is number of textbooks purchased. Correct Answers: A Select True or False from each pull-down menu, depending on whether the corresponding statement is true or false. ? 1. Sampling error refers to the difference between the sample and the population that exists only because of the observations that happened to be selected for the sample. ? 2. Two major types of errors can arise when a sample of observations is taken from a population: sampling error and nonsampling error.
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