Arandom sample size 10 was taken from a population. the sample has a variance of zero. which of the following statements must be true?
i) the population also has a variance of zero.
ii) the sample mean is equal to the sample median.
iii) the ten data points in the sample are equal in numerical value.
a) i only
b) ii only
c) iii only
d) i and ii
e) ii and iii

i am sure it will be 90 degrees.

step-by-step explanation:

for the points! : )

14

step-by-step explanation:

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have