Test 5 Solved Summer 2025 скачать в хорошем качестве

Test 5 Solved Summer 2025

In 2020, an organization surveyed 500 Democrats and asked, "Have you been to a Black Lives Matter protest?" Of the 500 Democrats, 440 said yes. 600 Republicans were asked the same question, and 500 said yes. 00:17 1. If you were doing a hypothesis test whether or not the proportion of Democrats who attend a BLM protest was higher than Republicans, at a significance level of 0.01, what would be the null and alternative hypothesis. Make sure that you define the parameter(s) if apporpriate. 01:44 2. What would the p-value be? (Round to 3 decimals) 02:53 3. You would reject the null hypothesis (True or False) 03:10 4. We can't conclude that more Democrats went to BLM protests than Republicans (True or False) 3:33 5. 8 people too the SAT and got the following scores 500, 512, 600, 650, 570, 580, 600, 612 In order to improve their score, they took an SAT prep course, and retook the SAT. Their new scores were: 490, 519, 650, 680, 571, 620, 650, 645 Is there significant evidence to conclude that the SAT prep course improves scores for all students? 04:20 a. State the null and alternative and defien the parameter(s) if appropriate. 05:35 b. State the test statistic and p-value 06:34 c. State the conclusion 07:46 6. In general, as a test statistic gets smaller, you have more evidence to reject the null hypothesis 08:07 7. A law was introduced to increase taxes in order to provide free college education. A survey was administered. Is there evidence at the 0.01 level that different ethnicities view the law differently? 09:03 a) State the null and alternative hypothesis. Define the parameter(s) if appropriate 09:21 b. Find the test statistic and p-value 10:51 c. Give the expected values 11:39 d. Which cell contributes the most to the tests statistic? 12:18 e. State the conclusion 13:22 8. To determine if the corona virus affects men differently than women, deaths of both genders were found. Ages of Men: 42, 45, 39, 40, 77, 84, 69, 93, 72, 50, 40 ,21, 18 Ages of Women: 17, 25, 15, 42, 18, 77, 90, 68, 71, 38 Perform a hypothesis test to determine if the average age of death for men and women is different. 13:37 a. State the null and alternative hypothesis. 14:55 b. Define the parameter(s) if appropriate 15:26 c. Find the test statistic and p-value 16:50 d. State the conclusion 18:19 9. True or False: For a test of independence, as the expected values and observed values get closer together, you have more evidence to conclude that their is an association between the two variables. 20:23 Review of every question and which section it came from