Two sets of observations are paired if each observation in one set has a special correspondence or connection with exactly one observation in the other data set.

1. Can be Paired or Not paired

Reason -

We might look at testing the difference of means using a two sample t-test. However, we may also try running a paired t-test.

But its used in cases where the observations are usually from the same populations at different times or through different sources etc.

Hence can't conclude that it is paired or not paired.

2. Paired

Reason -

Each record is a price of the same item from different stores.

3. Not paired

Reason -

This is again a case of testing the difference of means of two-samples (2 independent samples precisely) that are not paired.

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3 years ago

Alyaa bought a bag for 10000 shillings and sold it for 6000 shillings a:Find loss b: Find the percentage loss​

Alyaa bought a bag for 10000 shillings and sold it for 6000 shillings a:Find loss b: Find the percentage loss