The smaller the observed p-value, the more evidence you have against the null hypothesis. Select one: O True False
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- The Statistics Games are played by a large number of students across the county. Last year, 32% of Clayton State participated in the Games. You wonder: “Has the proportion increased this year?”. To find out, you take a random sample of 250 CSU students and ask them if they participated in the Games this year. You find that 38% did. Should you calculate a z-score or a t-score for your hypothesis test? A Neither, because the sample is not big enough- they did not ask all CSU students. B t-score because the sample is random and n is greater than 30. C z-score, because we are testing proportions, and the sample is random and has at least 5 successes (np=250*0.32) and 5 failures (nq = 250*0.68). D t-score because we don't know the population standard deviation. E z-score because our sample is random and the sample size is greater than 30.In a recent Super Bowl, a TV network predicted that 50 % of the audience would express an interest in seeing one of its forthcoming television shows. The network ran commercials for these shows during the Super Bowl. The day after the Super Bowl, and Advertising Group sampled 93 people who saw the commercials and found that 46 of them said they would watch one of the television shows. Suppose you are have the following null and alternative hypotheses for a test you are running: H0:p=0.5Ha:p<0.5 Calculate the test statistic, rounded to 3 decimal placesAt a high school debate tournament, half of the teams were asked to wear suits and ties and the rest were asked to wear jeans and T-shirts. The results are given in the table below. In order to test the claim at the 0.05 level that the proportion of wins is the same for teams wearing suits as for teams wearing jeans, what would the null hypothesis be? Win Loss Suit 22 28 T-Shirt 28 22 O A. The proportions of wins is different for teams wearing suits as for teams wearing jeans. O B. The proportions of wins is the same for teams wearing suits as for teams wearing jeans. O C. The mean number of wins is the same for teams wearing suits as for teams wearing jeans. O D. The mean number of wins is different for teams wearing suits as for teams wearing jeans.
- A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study, 362 babies were born, and 211 of them were girls. Use the sample data with the 0.01 significance level to test the claim that with this method, the probability of having a baby being a girl is greater than 0.5. Use this information to answer the following questions.Males and females were asked what they would do if they received a $100 bill in the mail that was addressed to their neighbor, but had been incorrectly delivered to them. Of the 70 males sampled, 55 said yes they would return it to their neighbor. Of the 130 females sampled, 120 said yes. The overall question is: Is this sufficient evidence to say that the two true proportions are different? Choose the best null and alternative hypothesis for this test. O Null: (p1 - p2) = 0 vs Alternative (p1 - p2) > O. O Null: (p1 - p2) = 0 vs Alternative (p1 - p2) not = 0. O Null: (mean 1 - mean 2) = 0 vs Alternative (mean 1 - mean 2) not = 0. %D %3D O Null: (p1 - p2) = 0 vs Alternative (p1 - p2) < 0. %3DFood inspectors inspect samples of food products to see if they are safe. This can be thought of as a hypothesis test with the following hypotheses. Họ: the food is safe Ha: the food is not safe The following is an example of what type of error? The sample suggests that the food is safe, but it actually is not safe. O type I O type II O not an error > Next Question Ce 24 % & 4. 5n 7 y 60 00 # 3m
- A professor suspects that the more often students attend their online lecture the better they will do on their quiz. Which of the following would be the null hypothesis for this professor's study? Select one: O a.r = 0 O b. p = 0 O c.ps0 O d. r2 0In a recent Super Bowl, a TV network predicted that 36 % of the audience would express an interest in seeing one of its forthcoming television shows. The network ran commercials for these shows during the Super Bowl. The day after the Super Bowl, and Advertising Group sampled 102 people who saw the commercials and found that 33 of them said they would watch one of the television shows.Suppose you are have the following null and alternative hypotheses for a test you are running:H0:p=0.36H0:p=0.36Ha:p<0.36Ha:p<0.36Calculate the test statistic, rounded to 3 decimal places z=z=In hypothesis testing it is important that you can test your null hypothesis mathematically. Suppose the probability of getting a head is p. a. Explain why you would choose your null hypothesis to be H0: p = 0.5 rather than H0: p ≠ 0.5. b. For your chosen null hypothesis, write down the alternative hypothesis.
- Using the accompanying data of restaurant sales, determine if the vanance of weekday sales is the same as that of weekend sales for each of the three variables (lunch, dinner, and delivery). Click the icon to view the restaurant sales data. Is there sufficient evidence at the 0.01 level of significance to condude that the vanance of weekday sales is the same as that of weekend sales for lunch sales? Determine the null hypothesis, H. and the alternative hypothesis. H₁. Let weekend sales be population 1 and weekday sales be population 2. H₂ Hi 11 (Type integers or decimals. Do not round.) Compute the test statistic (Round to two decimal places as needed.) Survey data Date Day Lunch Sales $ Dinner Sales $ Delivery Sales $ 4-Apr Wednesday 358 789 293 11-Apr Wednesday 386 665 299 18-Apr Wednesday 426 628 289 25-Apr Wednesday 331 729 253 3-Apr Tuesday 296 848 325 10-Apr Tuesday 308 572 328 17-Apr Tuesday 297 568 358 24-Apr Tuesday 229 529 402 5-Apr Thursday 402 808 273 12-Apr Thursday 420…Which of the following statements represents a null hypothesis? Strawberries are more nutritious than raspberries. More people prefer Burger King over McDonald's cheeseburgers. COVID is not more dangerous than influenza virus. Smoking cigars has a lower risk of cancer compared to smoking cigarettes.Which hypothesis represents the statement of "no change" (or "no affect/difference"), that we assume to be true? A.The one hypothesis, H1 B.The null hypothesis, H0 C.The right hypothesis, H0 D.The alternative Hypothesis, H1
