Question

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?Entry field with correct answer(b) How many variables are mentioned in the description?Entry field with correct answerHow many of these are categorical?Entry field with incorrect answer now contains modified dataHow many are quantitative?Entry field with incorrect answer now contains modified data(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 rows?Entry field with incorrect answer now contains modified dataHow many columns?

Answer 1

Answer:

a) 47

b) 3

c) 1

d) 2

e) 47

f) 3

Step-by-step explanation:

a) in the test, there are 47 participants. All took the test.

b) there are 3 variables in the test. There are text messages, distractions, and the messages answered.

c) 1 row and column will be the maximum number of rows and columns permissible

d) 2

e) 47

f) 3

Answer 2

The aim of a study is to improve understanding or to obtain new information

(a) 47 cases

(b) 4 variables; 4 categorical and 2 quantitative

(c) 47 rows and 4 columns

The reason the above values are correct are as follows;

             

(a) Cases are the units of the experiment, such as the persons that take part in the experiment

The number of cases (persons) are 47

(b) The variables in statistics are the items that can be varied

The variables are;

(1) Two passage scores, (2) Receiving text messages (distractions) (3) Whether  the participants thought  they were good at multitasking,

Therefore, there were four variables

The categorical variables are the variables that can be placed in categories

The categorical variable is if the participant thought of themselves as being good or not good at multitasking

Therefore;

• There was four categorical variable

The number of quantitative variable is the counted variable, which are the scores, therefore;

• There are two quantitative variables

(c) The number of rows = the number of cases = 47

The number of columns = The number of variables = 4

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