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Chapter 3 and 4 Practice Quiz

# Chapter 3 and 4 Practice Quiz - compare the grade point...

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9/15/2010 1 Stats 250 Fall 2010 The next 5 slides are short questions on the topics from chapters 3 and 4. Solutions are on the last slide. Q1: Most statistical inference techniques require the data to be… Q2: When a representative sample is selected but only a small proportion are actually able to be contacted (after many attempts), the problem is called… Q3: Random sample of 1,000 college students 16% said they had used Ecstasy. An approximate 95% confidence interval for the population proportion of all college students that have used Ecstasy is: Q4: 100 students were followed over a 6-month period. The number of students who took Echinacea (herbal supplement) and the number who developed colds were recorded. This is an example of an … A) Observational Study. B) Experiment. Q5: A study was conducted to

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Unformatted text preview: compare the grade point averages (GPAs) of male and female students majoring in Psychology. In this study … A) Gender and GPA are both response variables. B) Gender and GPA are both explanatory variables. C) GPA is an explanatory variable and Gender is a response variable. D) Gender is an explanatory variable and GPA is a response variable. 9/15/2010 2 SOLUTIONS: 1. C) random sample 2. C) nonresponse bias 3. A) 16% ± 3.2% 4. A) Observational Study. 5. D) Gender is an explanatory variable and GPA is a response variable. Great Job Today … Friday … On to Probability … to quantify uncertainty about our sample estimates. Practice HW “ due” tonight 11 PM. First real HW 1 available tomorrow 8 AM. Tech problems? [email protected] Ch 2, 3, 4 full notes, Practice quiz questions and solutions on Ctools this weekend. Prelab Lesson 02 available later tonight. Complete before next week’s lab section....
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Chapter 3 and 4 Practice Quiz - compare the grade point...

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