Chapter 1, Section 1, Exercise 022 Dont Text Whie Studying! For the 2015 Intel S

Question

Chapter 1, Section 1, Exercise 022 Dont Text Whie Studying! For the 2015 Intel Science Fair, two brothers in high school recruited 47 of their dlassmates to take part in a to-stage study. Participants had to read two different passages and then anser questions on them, and each person's score was recorded for each of the two tests. There 'vere no distractions for one ofthe passages, but participants received text messages while they read the other passage. Participants scored significantly worse when distracted by incoming texts. Participants were also asked if they thought they were good at multitasking (yes or no) but "even students who were confident of their abilities did just as poorly on the test while texting." (a) Ho many cases are there? (b) How many variables are mentioned in the description? How many of these are categorical? How many are quantitative? (c) If we created a dataset of the information with cases as rows and variables as columns, how many rows and how many columns would the dataset have? How many rous? How many columns?

Explanation / Answer

a) Number of cases = Number of participants = 47

b) Number of variables mentioned = 3

The variables are type of Passges, Disturbed in between or not and test score.

Number of categorical variables = 2

Number of quantitative variable = 1

c) Number of rows = 47

Number of columns = 3

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