Answer: 13
Step-by-step explanation:
To find the new mean after adding the score of 18, we can use the formula for the mean:
Mean = (Sum of all scores) / (Number of scores)
Given that the original sample mean is 12 and the new score added is 18, we need to calculate the sum of all scores in the original sample before adding 18.
Original sum = (Original mean) * (Number of scores)
Original sum = 12 * 5
Original = 60
Now, add the new score (18) to the original sum:
New sum = 60 + 18
New sum = 78
Now, let's find the new mean:
New mean = (New sum) / (Number of scores + 1)
New mean = 78 / (5 + 1)
New mean = 78 / 6
New mean = 13
The value of the mean after adding a score of x = 18 is 13.
Learn more about mean here: https://brainly.com/question/1136789
