SOLUTION: A sample of size 7 (n = 7) has a mean of M = 9.
One of the sample scores is changed from x = 19 to x = 5. What is the value for the new sample mean?
Algebra.Com
Question 577567: A sample of size 7 (n = 7) has a mean of M = 9.
One of the sample scores is changed from x = 19 to x = 5. What is the value for the new sample mean?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
The sum of the scores is 7*9 = 63
If we change one of the scores from 19 to 5, we decrease the sum by 14, so we get 49
The new sample mean is 49/7 = 7.
RELATED QUESTIONS
A sample of size 7 (n = 7) has a mean of M = 9.
One of the sample scores is changed... (answered by mercy)
A sample of size 7 (n=7) has a mean of m=9. One of the sample scores is changed from x=19 (answered by stanbon)
A sample of size 7 (n = 7) has a mean of M = 9.
One of the sample scores is changed... (answered by stanbon)
A sample of n = 10 scores has a mean of M = 7. One score in sample is changed from X = 21 (answered by ikleyn)
1)A sample of n = 10 scores has a mean of M = 9. One person with a score of X = 0 is... (answered by Boreal)
one sample of n=12 scores has a mean of M=7 and a second sample of n=8 scores has a mean... (answered by ikleyn)
A sample of n=9 scores has mean=13. A new score of x=4 is added to sample.
a._______... (answered by Fombitz)
Hello! Please help me with this:
In a sample of n = 6 scores, the smallest score is X =... (answered by Theo)
A population of values has a normal distribution with = 131.2 and o = 20.3. You intend to (answered by Theo)