alternative hypothesis

  1. M

    T Test word problem! HELP

    im going crazy trying to figure out this problem; please help! 2. Assume that we drew a random sample of 300 women who had recently graduated from USC. All of these women worked full time in 2018. They earned an average salary of $42,167 (s.d. = $26,413). Based on data from the US Census...
  2. H

    Stata: Test that the difference between two groups = -1

    Does anyone know how to test the hypothesis that the difference between people without and with kids = -1 per night in Stata? I have the data set with kids as a dummy variable, but can't figure out where to start.
  3. S

    Sample Mean and Standard Deviation affects results to support reject Null Hypothesis

    Hi All, I'm pretty new to Hypothesis Testing and I've come across a question I'm not sure of and was hoping someone could explain it. Suppose we wish to test H0: µ = 15 , HA: µ ≠15. Which of the following possible sample results give the most evidence to support HA? And the options...
  4. V

    Hypothesis Testing

    Can someone please explain this? How did that conclusion arrive? P(Type I error) = P(reject H0 | H0 is true) = P(X1 ≤ c, X2 ≤ c | N = 16) = cC2 / 16C2 = c(c-1)/240 What if it was P(Type I error) = P(reject H0 | H0 is true) = P((X1+X2)/2 ≤ c | N = 16) would the equation be different?
  5. J

    Null and Alternative Hypothesis question

    Hey guys I am really stuck on this one question and have no way to go about it. I would really appreciate any help I could get. Question 4 A sociologist believes that women sleep longer per night on the weekend than men. Sixty one people were surveyed. The following summary statistics were...
  6. E

    Null Hypothesis Rules: Can no difference be the alternative hypothesis?

    For his dissertation a colleague has developed a software tool and has the expectation (hypothesis) that people can complete the task with the software tool without taking longer than the older, manual method. He has to write up his hypotheses with null and alternative hypotheses. He asked me if...