Indicate the answer choice that best completes the statement or answers the ques
ID: 3045330 • Letter: I
Question
Indicate the answer choice that best completes the statement or answers the question 1. What is the standard deviation of the following groups of scores? 14 10 a. 2.87 b. 3.0 c. 5.66 d. 1058 e. None of these 2. What is the mean of the following g oup of scores: 4,7, 8, 8, 9, 10, 12, and 147 b. 8.5 d. 9.5 e. None of these What is the median of the following groups of scores: 4,7,8, 8,9, 10, 12, and 14? a. b. 8.5 d. 9.5 e. None of these What is the interquartile range of the following groups of scores? 14 a. 6.5-9.5 b. 7.0-10.0 c. 7.5-10. d. 8.0-10.5 e. 1.5-3.0Explanation / Answer
Solution:
a) option a. 2.87
2. option c. 9
Mean = sum of terms /number of terms = 72/8 = 9
3. option b. 8.5
median = The median is the middle number in a sorted list of numbers. So, to find the median, we need to place the numbers in value order and find the middle number.
Ordering the data from least to greatest, we get:
4 7 8 8 9 10 12 14
As you can see, we do not have just one middle number but we have a pair of middle numbers, so the median is the average of these two numbers:
(8+9)/2 = 8.5
4. option b. 7.0-10.0