Adrian hopes that his new training methods have improved his batting average. Before starting his new regimen, he was batting 0.250 in a random sample of 96 at bats. For a random sample of 56 at bats since changing his training techniques, his batting average is 0.375. Determine if there is sufficient evidence to say that his batting average has improved at the 0.02 level of significance. Let the results before starting the new regimen be Population 1 and let the results after the training be Population 2. Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Ho: P₁ = P2 Ha Pi P2

A teacher claims that over 9% of maths students are married. In the survey at the beginning of semester, 45 students answered the question about their marital status. 9 of them said they were married. Calculate the test statistic Z? Round answer to 2 decimals

ou are doing a problem where you have a negative z-score, and you have to look up the proportion of the shaded area in the tail beyond that z-score; in other words, you are shading to the left from your z-score, and looking for the proportion that you shaded.  Four “proportions” are given below.  Which one is the ONLY one that could potentially be the number you are looking for?  (Hint: Think about what you know about proportions: What kind of number are they?  And what things can they represent?) Group of answer choices p = 0.3800 p = -0.1500 p = 1.1500 p = 0.5635

Use the random numbers. Thank you.