Statistics > SOPHIA Milestone > Stats_2.0_Practice_Milestone_1___2.pdf. GRADED A+ (All)

Stats_2.0_Practice_Milestone_1___2.pdf. GRADED A+

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Are you ready to take Milestone 1? Taking this practice test is a stress-free way to find out if you are ready for Milestone 1 assessment. You can print it and test yourself to discover your strengths and weaknesses. The answer key is at the end of this practice milestone. QUESTION 1 One typical way to select a sample is to randomly pick phone numbers from a telephone book. This method can introduce __________, because those that cannot afford a telephone, chose not to have a telephone, or do not list their phone numbers will not be represented. Solution guide Tutorials that teach this concept The sample is collected in a way that leaves out those that do not have a phone or those who choose to not publish their phone numbers in the phone book. Therefore, the sample is not representative of the population. data, bias, Sampling QUESTION 2 A __________ variable is an unforeseen variable that is related to the explanatory variable and has a significant effect on the response variable. Solution guide Tutorials that teach this concept Remember that the explanatory variable is the independent variable that has an effect on the response variable (dependent variable). When we can’t tell if it is in fact the explanatory variable affecting the response variable, or if it is another variable that was taken into account, what do we call that? variables, confounding variables SOPHIA PATHWAYS FOR COLLEGE CREDIT – STATISTICS PRACTICE MILESTONE 1 © 2012 Sophia Learning, LLC. QUESTION 3 Data that was gathered for a past study and re-used to answer questions in a present study is called __________ data. Solution guide Tutorials that teach this concept There are two ways to collect data. New data can be collected, or data that has already been collected can be used. What is the name for each type of data? data QUESTION 4 Sample surveys are one form of a(n) __________ statistical study? Solution guide Tutorials that teach this concept Sample surveys can be used to make observations/inferences about populations, whereas an experiment manipulates one variable to measure another. surveys, observational studies, experiments QUESTION 5 A nationwide study of hospital service in maternity wards randomly selected 45 hospitals. Every birth mother who had a child during the first week of June at any of these 45 hospitals completed a survey on service received in the maternity ward. This is an example of __________ sampling. Solution guide Tutorials that teach this concept Think about how the sample was collected. First, the hospitals were randomly selected. Secondly, every mother that delivered in the maternity ward only during the first week of June was surveyed. What type of sampling divides the population more than once, and then samples every subject within the final group that has been randomly selected? simple random samples, systematic random samples, stratified random samples, cluster samples, multi-stage sample SOPHIA PATHWAYS FOR COLLEGE CREDIT – STATISTICS PRACTICE MILESTONE 1 © 2012 Sophia Learning, LLC. QUESTION 6 A sample composed of people who are readily available, easily recruited, or volunteer is called a __________ sample. Solution guide Tutorials that teach this concept This type of sampling method typically will not repre

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