Let's say we want to do a 2 sample t-test and we want to know if the difference between groups 1 and 2 is zero or not. What are the null and alternate hypothesis?

A statistics instructor who teaches a lecture section of 160 students wants to determine whether students have more difficulty with one-tailed hypothesis tests or with two-tailed hypothesis tests. On the next exam, 80 of the students, chosen at random, get a version of the exam with a 10-point question that requires a one-tailed test. The other 80 students get a question that is identical except that it requires a two-tailed test. The one-tailed students average 7.79 points, and their standard deviation is 1.06 points. The two-tailed students average 7.64 points, and their standard deviation is 1.31 points. a) Can you conclude that the mean score μ1 on one-tailed hypothesis test questions is higher than the mean score μ2 on two-tailed hypothesis test questions? State the appropriate null and alternate hypotheses, and then compute the P-value. b) Can you conclude that the mean score μ1 on one-tailed hypothesis test questions differs from the mean score μ2 on two-tailed hypothesis test…

If the decision in a hypothesis test said to reject Ho, then we can always make a conclusion that the sample data supports the claim. True False

Suppose you conduct a hypothesis test based on a sample where the sample size is n = 50, and arrive at a p-value of 0.08. You then refer back to your notes and discover that you made a careless mistake, the sample size should have been n = 500. Will your p-value increase, decrease, or stay the same?     stay the same       increase       decrease       Answer not here

What does it mean when we reject the null hypothesis? What conclusion do we make, etc.? Explain in as much detail as you can

The first pic is the question, since I’ve been receiving some incorrect answers from the tutors, I included an example problem in the second pic

please answer a, b, c

7. You have seen this question before. Human volunteers were asked to try five types of meat products. One of these was dog food; the others were various types of pâté. The volunteers were asked which of the five was their favorite. Two out of 18 volunteers chose the dog food. Is there evidence that people prefer human food over dog food? Show all four steps of hypothesis testing.

I don't know where to begin to build a hypothesis Test.

When we test the hypothesis, can you explain the difference between one and of two-sample tests? How would I know if I can reject this null hypothesis? Can you give an example of the one and two-sample tests? Why does the t-value have different formulas in a two-sample test?