Task:
Complete the below:
Q1. Find the mean, median, and mode for the set of scores in the following frequency distribution table:
X
10
9
8
7
6
5
f
2
3
5
6
3
1
Q2. A sample of n= 20 scores has a mean of M=6. If one person with a score of X= 2 is added to the sample, what will be the value of the new mean?
Q3. A sample of n = 7 score has a mean of M = 5. After one new score is added to the sample, the new mean is found to be M=7. What is the value of the new score?
Q4. A population has u = 100 and o = 20. If you select a single score from this population, on the average, how close would it be to the population mean? Explain your answer.
Q5. A sample of n= 20 scores has a mean of M= 30.
a. If the sample standard deviation is s = 10, would a score of X = 38 be considered an extreme value (out of the tail of the distribution)?
b. If the sample standard deviation is s = 2, would a score of X = 38 be considered an extreme value) out in the tail of the distribution)?
Q6. For the following scores:
1, 0, 4, 1, 1, 5
a. Calculate the mean.
b. Find the deviation for each score, and check that the deviation sum to zero.
c. Square each deviation and compute SS.