Question

example 3
suppose a researcher collected student data on ccds campus and asked students what year they were and if they worked outside of school or not. the results are as follows:

a) find the probability that a student has 1 job.
how do you find the answer for part (a)?
o a the answer is 8/30, because 8 is the first value in the 1 job column and there are 30 total people sampled.
o b the answer is 19/30, because you must find the total of 1 job and then divide by the total number of people sampled.

Explanation:

Step1: Determine the number of students with 1 job

From the table, the total number of students with 1 job is \( 19 \) (sum of \( 8 \) (1st - year students with 1 job) and \( 11 \) (2nd - year students with 1 job)).

Step2: Determine the total number of students

The total number of students sampled is \( 30 \).

Step3: Calculate the probability

The probability \( P\) (student has 1 job) is given by the formula \( P=\frac{\text{Number of students with 1 job}}{\text{Total number of students}} \). Substituting the values, we get \( P = \frac{19}{30} \).

Answer:

B. The answer is \( \frac{19}{30} \), because you must find the total of "1 job" and then divide by the total number of people sampled.