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1. The null hypothesis (H0) says about the treatment is that it does not affect the scores.

   What is hypothesis testing?

   Hypothesis testing is the statistical method that uses the data from a sample to conclude a population parameter or a population distribution.

   There are two types of hypothesis testing. They are the null hypothesis and the alternative hypothesis.

   • If the obtained value is less than the threshold value then the null hypothesis is accepted and the alternative hypothesis is rejected.
   • If the obtained value is greater than the threshold value then the null hypothesis is rejected and the alternative hypothesis is accepted.

   What is a null hypothesis?

   • The null hypothesis says that there is no difference between the sample means of the two groups.
   • This is a statement about a population parameter.
   • Where the possibilities are the same.

   It is given that,

   A researcher selects a sample and administers a treatment to the individuals in the sample.

   A hypothesis test is conducted on the sample.

   So, the null hypothesis (H0) says about the treatment is that it does not affect the score obtained.

   Learn more about the null hypothesis test here:

   https://brainly.com/question/515658

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