What is the purpose of a two sample t-test? to test if two samples are the same. to test if two populations are the same. to test if two population means are the same. to test if two sample means are the same

To test if two population means are the same.

Step-by-step explanation:

To Find :What is the purpose of a two sample t-test?

Solution:

Two sample test is used to check the difference between the two population means .

Let us suppose mean of population 1 =

Let us suppose mean of population 2=

So, Two sample test is used to check whether or

Hence the purpose of a two sample t-test is To test if two population means are the same.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.