A group of marketing researchers for a popular cell phone manufacturer collected the following information about young adults (aged 18 – 25 ): 1 percent use a cell phone that is 3 years or older, 2 percent use a cell phone that is 2 – 3 years old, 20 percent use a cell phone that is 1 – 2 years old, and 77 percent use a cell phone that is less than 1 year old. Suppose a young adult was selected at random. Let cap x equal the age of a randomly selected person’s cell phone. Which of the following is the probability distribution for the age of that person’s cell phone?
Answer
A
Table with 4 columns and 2 rows.Row 1: Column 1, '<1'; Column 2, '1≤X<2'; Column 3, '2≤X<3'; Column 4, 'is greater than or equal to 3' Row 2: Column 1, '0 point 7 7'; Column 2, '0 point 2 0'; Column 3, '0 point 2'; Column 4, '0 point 1'
B
Table with 4 columns and 2 rows.Row 1: Column 1, '<1'; Column 2, '1≤X<2'; Column 3, '2≤X<3'; Column 4, 'is greater than or equal to 3' Row 2: Column 1, '0 point 7 7'; Column 2, '0 point 2 0'; Column 3, '0 point 0 2'; Column 4, '0 point 0 1'
C
Table with 4 columns and 2 rows.Row 1: Column 1, '<1'; Column 2, '1≤X<2'; Column 3, '2≤X<3'; Column 4, 'is greater than or equal to 3' Row 2: Column 1, '0 point 2 5'; Column 2, '0 point 2 5'; Column 3, '0 point 2 5'; Column 4, '0 point 2 5'
D
Table with 4 columns and 2 rows.Row 1: Column 1, '<1'; Column 2, '1≤X<2'; Column 3, '2≤X<3'; Column 4, 'is greater than or equal to 3' Row 2: Column 1, '0 point 0 1'; Column 2, '0 point 0 2'; Column 3, '0 point 2 0'; Column 4, '0 point 7 7'