The process of making a conjecture about the value of a population parameter, collecting sample data that can be used to assess this conjecture, measuring the strength of the evidence against the conjecture that is provided by the sample, and using these results to draw a conclusion about the conjecture is known as

Hypothesis testing

Explanation:

Hypothesis testing is the theory, methods, and practice of testing a hypothesis by comparing it with the null hypothesis. The null hypothesis is only rejected if its probability falls below a predetermined significance level, in which case the hypothesis being tested is said to have that level of significance.

The null hypothesis is H₀ while the alternative hypothesis , when the null hypothesis is rejected, the alternative hypothesis hypothesis is employed.

i’m   sure probably just geuss and see which one you can get right, i’m pretty sure it is the combination of goods and services