If my goal is to test whether there is any difference in grocery prices between Piggly Wiggly and Publix, which among the following statement(s) regarding study design, data collection and hypothesis test is/are correct?a. We have to make sure grocery items sampled from Piggly Wiggly are different from grocery items sampled from Publix.b. We have to make sure grocery items sampled from Piggly Wiggly are the same with grocery items sampled from Publix.c. The more data we collect, the better; because we can use 2-sample z test instead of 2-sample t test if the sample size is greater than 30.d. We should use paired t test.e. We should use 2-sample t test with unequal standard deviation.f. We should use 2-sample pooled-t test (equal standard deviation).

There are two hypotheses. The first one is called the null hypothesis and it is chosen such that it predicts nullity or no change in a thing. It is usually the hypothesis against which we do the test. The hypothesis which we put against the null hypothesis is an alternate hypothesis.

The null hypothesis is the one which researchers try to disprove.

The statement regarding study design, data collection and hypothesis test that is correct is statement 'B' because We have to make sure grocery items sampled from Piggly Wiggly are the same as grocery items sampled from Publix. Comparing different product prices won't give the correct result.

Hence, the correct option is B.

Learn more about Null and Alternative hypotheses:

https://brainly.com/question/18831983

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