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MATH 225N WEEK 1 ASSIGNMENT SAMPLING METHODS – QUESTIONS AND ANSWERS Questions 1. Assume that 80 houses are present in the form of a grid consisting of 10 columns and 8 rows. If a loud speaker is placed just before the first row, which sampling method works the best to select a sample of houses if we want to get an estimate of the average loudness (measured in decibels) near all the 80 houses? ________________________________________ Select the correct answer below: _____________________...

MATH 255N WEEK 1 ASSIGNMENT, VARIABLES AND MEASURES OF DATA 1. Which of the following best describes the term explanatory variable? ________________________________________ Select the correct answer below: ________________________________________ the dependent variable in an experiment a value or component of the independent variable applied in an experiment a variable that has an effect on a study even though it is neither an independent nor a dependent variable the inde...

MATH 225N WEEK 4 HOMEWORK PROBABILITY QUESTION AND ANSWERS 1. Which of the pairs of events below is dependent? ________________________________________ Select the correct answer below: ________________________________________ drawing a 7 and then drawing another 7 with replacement from a standard deck of cards rolling a 1 and then rolling a 6 with a standard die rolling a 3 and then rolling a 4 with a standard die drawing a heart and then drawing a spade without replacement from a st...

MATH 225N WEEK 8 QUESTIONS WITH ANSWERS Performing Linear Regressions with Technology An amateur astronomer is researching statistical properties of known stars using a variety of databases. They collect the absolute magnitude or MV and stellar mass or M⊙ for 30 stars. The absolute magnitude of a star is the intensity of light that would be observed from the star at a distance of 10 parsecs from the star. This is measured in terms of a particular band of the light spectrum, indicated ...

MATH 225N WEEK 6 QUIZ STATISTICS – QUESTION AND ANSWERS Question 1 A statistics professor recently graded final exams for students in her introductory statistics course. In a review of her grading, she found the mean score out of 100 points was a x¯=77, with a margin of error of 10. Construct a confidence interval for the mean score (out of 100 points) on the final exam. ________________________________________ That is correct! ________________________________________ $$(67, 87) Answ...

MATH 225N FINAL EXAM 2 – QUESTION AND ANSWERS 1/1 POINTS A fitness center claims that the mean amount of time that a person spends at the gym per visit is 33 minutes. Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the parameter μ. ________________________________________ That is correct! ________________________________________ H0: μ≠33; Ha: μ=33 H0: μ=33; Ha: μ≠33 H0: μ≥33; Ha: μ<33 H0: μ≤33; Ha: μ>33 Answer Expla...

Sophia US History I-Unit 2: Challenge 1: Questions & Answers 1. What was one major difference between England's colonies and those of other European powers like the Spanish and the French? Answer: England's colonies attracted a much larger number of permanent settlers. 2. Which of the following statements is true? Answer: Many English aristocrats feared that James II would become too powerful and restore Catholicism to England. 3. What does the diary of William Byrd demonstrate abou...

Sophia Intro to Sociology Milestone 1 Which of the following theoretical approaches analyzes how racial conflicts affect society? Gender conflict theory Race conflict theory Social conflict theory Symbolic interaction theory CONCEPT Race Conflict Theory __________ research emphasizes the need for the researcher to be as objective as possible. Gynocentric Value-free research Verstehen Value-relevant research CONCEPT Conducting Sociological Research Jackie uses graphs and c...

Unit 1 Challenge 2 - Introduction to Sociology (Sophia) Which theoretical approach identifies the core of society as the result of all interactions? • A.) Structural functional approach • B.) Symbolic interaction approach • C.) Social conflict approach Which of the following statements about structural functional theory is true? • A.) Structural functional theory uses a macro-level orientation, AND views society as a complex, interconnected machine. • B.) Structural functiona...

Sophia - Environmental Science - Unit 2 Challenge 3. 1 — Photosynthesis and the Carbon Cycle Determine how carbon is cycled between plants and animals. How is carbon cycled between plants and animals? • a.) Dying organisms consume oil and coal. • b.) An animal eats a plant, then absorbs and exhales the carbon, which is then absorbed by other plants during photosynthesis. • c.) Plants use oxygen combined with sugar, to create water and carbon in order to grow. • d.) Plants releas...