Stats exam 1 - Study guides, Class notes & Summaries

Suppose that someone sampled 100 Palm trees of the same species, all planted at the same time. They recorded the height for each tree. What shape would you expect the histogram of this data to be? A. Symmetric B. Right Skewed C. Left Skewed D. Uniform - Answer- A. (Symmetric) A marketing researcher is testing out new names for a hair product. She asks 40 women to pick the name of the product that they would be most likely to buy out of a list of 4 names. Could she use a dotplot to descr...

Bicycle safety- Ian Walker, a psychologist at the University of Bath, wondered whether drivers treat bicycle riders differently when they wear helmets. He rigged his bicycle with an ultrasonic sensor that could measure how close each car was that passed him. He then rode on alternating days with and without a helmet. Out of 2500 cars passing him, he found that when he wore his helmet, motorists passed 3.35 inches closer to him, on average, than when his head was bare. (Source: NY Times, Dec. 10,...

stats exam 1 questions with correct answers

BCTC STATS EXAM 1 2024 WITH 100% CORRECT ANSWERS What is a voluntary response sample? - correct answer A sample in which the subjects themselves decide whether to be included in the study. Use common sense to determine whether the given event is either impossible, possible but very unlikely, or possible and likely. (New England beat Denver in a football game by a score of 140 to 100) - correct answer possible, but very unlikely In a study of a weight loss program, 45 subjects lost a...

chapter 1 #15 Bicycle safety- Ian Walker, a psychologist at the University of Bath, wondered whether drivers treat bicycle riders differently when they wear helmets. He rigged his bicycle with an ultrasonic sensor that could measure how close each car was that passed him. He then rode on alternating days with and without a helmet. Out of 2500 cars passing him, he found that when he wore his helmet, motorists passed 3.35 inches closer to him, on average, than when his head was bare. (Source: ...

Stats Exam 1 Pierson

A table or listing that shows values and how many times each value occurs is: - Frequency distribution What is the simplest, most fundamental level of measurement? - Nominal Students are given grades of A, B, C, D, or F on their homework assignments. The use of letter grades would be an example of what level of measurement? - Ordinal The scale of measurement that assumes there is an underlying scale of equal units, but without an absolute zero point, is the ______ scale of measurement. - i...

Stats Exam 1 Questions & Answers 2023/2024 Data is another word for - ANSWER-facts A listing of values or responses is - ANSWER-data distribution A table or listing that shows values and how many times each value occurs is - ANSWER-frequency distribution A collection or bundle of information relative to specific variables is referred to as a - ANSWER-Data set An individual piece of information in a data set is referred to as a - ANSWER-data point What is the simplest, most fu...

Stats Exam 1 Questions & Answers 2023/2024 Population - ANSWER-Refers to the total set of observations that can be made Sample - ANSWER-Refers to the set of observations drawn from a population Sampling Method - ANSWER-How the data is collected Random Sampling - ANSWER-Each member of the population has an equal chance of being selected Voluntary Response Sample (Self-Selected Sample) - ANSWER-Respondents decide whether or not to participate (Polls, calls, email, online surveys) ...

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