For the 2015 Intel Science Fair, two brothers in high school recruited 47 of their classmates to take part in a two-stage study. Participants had to read two different passages and then answer questions on them, and each person's score was recorded for each of the two tests. There were no distractions for one of the 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."1

(a) How many cases are there? (b) How many variables are mentioned in the description? i. How many of these are categorical? ii. How many are quantitative?

Question

Danny Ortega

Mathematics

2 November, 19:45

For the 2015 Intel Science Fair, two brothers in high school recruited 47 of their classmates to take part in a two-stage study. Participants had to read two different passages and then answer questions on them, and each person's score was recorded for each of the two tests. There were no distractions for one of the 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."1

(a) How many cases are there? (b) How many variables are mentioned in the description? i. How many of these are categorical? ii. How many are quantitative?

+1

Answers (1)

Know the Answer?

Terry Quinn · Answer 1

a) The number of participants in the study are 47. Therefore, the number of cases is 47.

b) The number of variables mentioned are 3.

The variables are: Test-1, Test-2 and Multitasking question.

The number of categorical variable is multitasking question = 1

Number of quantitative variable are 2. They are test scores for test 1 and 2.