Question

Extreme
(D) Z-scores
5. The measure of central tendency listed below is:
(A) The raw score
(B) The mean
(C) The range
(D) Standard deviation
6. The mean of 10 observations is 10. All the observations are increased by 10%. The
observations will be:
(A) 10
(B) 1.1
(C) 10.1
(D) 11
7. The sample mean of first n natural numbers is:
(A) n(n+ 1)/2
(B) (n+1)/2
(C) n/2
(D) (n+1)/2​

Answer 1

Answer:

I don't know if you have any questions please feel

Answer 2

Given :   The mean of 10 observations is 10. All the observations are increased by 10%.  

To find :  New Mean

Solution:

The mean of 10 observations is 10

Hence total = 10 x 10  = 100

Each observation is increased by 10 % Hence new total = 100 + (10/100) 100

= 110

New Mean = 110/10  = 11

The measure of central tendency listed below is:  the MEAN

Mean median and mode are measure of central tendency

Range , Standard deviation , Quartile range are Measure of dispersion.

The sample mean of first n natural numbers is: (n + 1) /2

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