8. Suppose you test the hypothesis that Intervention A is more effective than Intervention B in preventing high school dropout. How would you word the null and alternative hypotheses?
Q: Look at the table that lists SAT scores before and after a sample of five students took a prep class…
A: Introduction: It is of interest to test if the prep class is effective in improving SAT scores.
Q: Write the null and alternative hypotheses you would use to test each of the situations in parts (a)…
A:
Q: I have 20 chickens and I average 16 eggs per day. Using this data, how would I find the null and…
A: The population parameter is the population mean μ. State the hypotheses the null hypothesis and an…
Q: At one school, the average amount of time that tenth-graders spend watching television each week is…
A: Here we want to perform hypothesis test.
Q: b) A pharmaceutical company wonders if its new drug has a cure rate different from the 58% rate…
A: Here we are conducting a hypothesis test to check if the cure rate of new drug is different from the…
Q: A college professor states that this year's entering students appear to be smarter than entering…
A: We have given that this year's entering students appear to be smarter than entering students from…
Q: You are conducting a stuldy to significantly different from 53% at a level of significance of a-…
A: a. It can be considered that the sample is collected using a random method.
Q: A hypothesis test was conducted to see if a new HIV vaccination reduces the risk of contracting the…
A: The claim of the hypothesis test is that the new HIV vaccination reduces the risk of contracting the…
Q: James is a school psychologist who wants to implement stress coping skills to help his students. His…
A: Here the direction of the test is to the left.
Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…
A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…
Q: -Find the correct null hypothesis and for each correct alternative hypothesis 1. Suppose a pollster…
A:
Q: 21. A high school statistics class (over several instructors and years) typically gets an average of…
A: In order to test the claim of instructor that the average score of class is greater than 3.9,…
Q: STEPS IN STATISTICAL HYPOTHESIS TESTING 1. Analyze the problem 2. Formulate the null and…
A: Given that, The teacher would like to know if the class will be able to absorb the lecture from a…
Q: The CEO of a large computer company claims that 80 percent of his customers are "very satisfied"…
A: Formula used: the population proportion p p = x/n
Q: According to the Pew Research Center, 14% of adults rate basketball as their favorite sport. Your…
A: sample size(n)=120 x=12 significance level(α)=0.05 claim is that the proportion may be lower than…
Q: You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected at the 0.01…
A: Statement: " If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected…
Q: Helga would like to assess the proportion of bilingual children in Iceland. It has been claimed that…
A: sample size = 200 23 were bilingual. So, sample proportion- 23200=0.115 The test to be carried out…
Q: 3. Do the following for the case below. a. State the null and alternative hypotheses for a…
A: A hypothesis is an assumption that can be tested to see if it is true or not.
Q: fast-food
A:
Q: Alex hypothesized that students study less than the recommended two hours per credit hour each week…
A: Type I error: Rejecting null hypothesis Ho. In fact, the null hypothesis Ho true. Type II error:…
Q: You have just analyzed the results from your experiment, and you calculated p = .13. What…
A: It is given that the p-value=0.13. Consider the level of significance is as 0.05.
Q: A well known Maine canoe company claims to be favored by over 60% of white water canoeists. A…
A: The null and the alternative hypotheses are, H0: Maine canoe company is favored by less than or…
Q: A man is on trial accused of murder in the first degree. The prosecutor presents evidence that he…
A:
Q: Abigail, who works for a region's department of health, is looking for evidence that the percentage…
A: Given that Abigail is testing to check the claim that the percentage of current smokers in the…
Q: Suppose your marketing department feels like 36% of customers prefer a certain feature for a…
A: a) The null hypothesis is: H0: p = 0.36
Q: Samples of Republicans, Democrats, and Independents have been tested for their level of support for…
A: Given information- We have given that samples of Republicans, Democrats, and Independents have been…
Q: If your question is that your significant hypothesis test is significant “enough” to have true…
A: Statistical significance: Statistical signifcance is the likelihood that a relationship between two…
Q: 3. A claim is made that the proportion of college students who have Netflix accounts is 0.85. Noah…
A: From the given information we conduct z test for proportion and find the P value for that.
Q: cextbook publisher claims that 75% of college students enrolled in a course that uses their ktbooks…
A: Solution: Given information: n= 111 Sample size of students x= 92 students used textbook pass the…
Q: 9.135 Kicking the cigarette habit. Can taking an antidep drug help cigarette smokers kick their…
A: a. Null Hypothesis: H0: There is no difference in the proportions of not smoking one year later…
Q: -Find the correct null hypothesis and for each correct alternative hypothesis 3. Suppose you hear a…
A: The claim is that the average is higher than 78.
Q: A decade-old study found that the proportion of high school seniors who felt that "getting rich" was…
A: From the provided information, A decade-old study found that the proportion of high school seniors…
Q: (a) A dictator is concerned about his "negatives," that is, the percentage of the country's…
A: To write the null and alternative hypothesis for the given situation.
Q: • Employees from Company A and Company B both receive annual bonuses. What information would you…
A: Null and Alternate Hypothesis: H0: μA- μB=100HA: μA- μB>100 We will need: Sample size A =nA…
Q: The alternative hypothesis: The type of test statistic: The value of the test statistic: (Round to…
A: Test is that whether the mean annual income of teachers in state of Utah is greater than or equal to…
Q: -Find the correct null hypothesis and for each correct alternative hypothesis 7. Suppose you hear a…
A: Solution
Q: You are management for a chain of department stores. Your analytics team believes that the…
A: Given datayou are a management for a chain of departement stores.Here n=48x=17p=25%
Q: A study done on a marriage counseling course showed that the proportion of couples for which the…
A: Claim:The proportion of couples for which the communicationprogram can prevent divorce is less than…
Q: How the researchers testify the following hypotheses? Describe suitable research analysis names for…
A: In statistical analysis, first, we create an object, and according to the objective, we collect…
Q: 5. Conclusions True or false: In hypothesis testing, it is never valid to form a conclusion of…
A: Given Statement: In hypothesis testing, it is never valid to form a conclusion of supporting the…
Q: 2. Use the following scenario to conduct a hypothesis test. Then use that to answer questions a- g.…
A: "Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Step by step
Solved in 2 steps
- If you have questioned that your significant hypothesis test is significant “enough” to have true meaning, what are some other things you can look at to determine practical significance?STEPS IN STATISTICALHYPOTHESIS TESTING 1. Analyze the problem2. Formulate the null and alternative hypothesis3. Determine the tails of the test4. Determine the test to be used5. Compute6. Conclude Instruction:Using the steps in hypothesis testing, test the following hypotheses using the appropriate test statistic. A student would like to know which establishment would allow him to save more money from everyday food costs. He is choosing between AVM or Hollywood Terraces, so he traced his spending in both establishments for 1 school week each, his data is as follows:AVM: 97, 85, 69, 105, 105HT: 60, 45, 60, 75, 100When a result is not extreme enough to reject the null hypothesis, explain why it is wrong to conclude that your result supports the null hypothesis.
- Would you favor spending more federal tax money on the arts? Of a random sample of n1 = 232 women, r1 = 66 responded yes. Another random sample of n2 = 198 men showed that r2 = 65 responded yes. Does this information indicate a difference (either way) between the population proportion of women and the population proportion of men who favor spending more federal tax dollars on the arts? Use ? = 0.05. State the null and alternate hypotheses. H0: p1 = p2; H1: p1 ≠ p2H0: p1 < p2; H1: p1 = p2 H0: p1 = p2; H1: p1 > p2H0: p1 = p2; H1: p1 < p2 (b) What sampling distribution will you use? What assumptions are you making? The Student's t. We assume the population distributions are approximately normal.The standard normal. We assume the population distributions are approximately normal. The standard normal. The number of trials is sufficiently large.The Student's t. The number of trials is sufficiently large. What is the value of the sample test statistic? (Test the difference p1…The board of directors for Procter and Gamble is concerned that only 19% of the people who use toothpaste buy Crest toothpaste. A marketing director suggests that the company invest in a new marketing campaign which will include advertisements and new labeling for the toothpaste. The research department conducts product trials in test markets for one month to determine if the market share increases with new labels. Write the company's null and alternative hypotheses. Ho: In this context describe a Type I error and the impact such an error would have on the company. O Rejecting the null hypothesis when in fact it is true O Failing to reject the null hypothesis when in fact it is false In this context describe a Type Il error and the impact such an error would have on the company. O Rejecting the null hypothesis when in fact it is true O Failing to reject the null hypothesis when in fact it is false Based on the data they collected during the trial the research department found that a…What are the two decisions that you can make from performing a hypothesis test? What are the two decisions that you can make from performing a hypothesis test? Select all that apply. A. reject the alternative hypothesis B. make a type I error C. accept the alternative hypothesis D. reject the null hypothesis E. accept the null hypothesis F. fail to reject the alternative hypothesis G. fail to reject the null hypothesis H. make a type II error
- What are the two decisions that you can make from performing a hypothesis test? What are the two decisions that you can make from performing a hypothesis test? Select all that apply. O A. reject the null hypothesis O B. accept the alternative hypothesis O C. accept the null hypothesis O D. fail to reject the alternative hypothesis O E. reject the alternative hypothesis O F. fail to reject the null hypothesis OG. make a type I error O H. make a type Il errorYou are testing the difference between high school freshmen and seniors on SAT performance. The null hypothesis is that the population mean SAT score of the seniors is equal to the population mean SAT score of the freshmen. You randomly sample 20 students in each grade and have them take the SAT. You find that the sample mean of the seniors is significantly higher than the sample mean of the freshmen. Which alternative hypothesis is accepted? The population mean SAT score of the seniors is less than the population mean SAT score of the freshmen. The population mean SAT score of the seniors is greater than the population mean SAT score of the freshmen. You cannot be sure which alternative hypothesis to accept. You just know that the null hypothesis was rejectedWhen a researcher conducts an experiment and fails to find significant results, what should she conclude? The research hypothesis is false The current data are inconclusive with regards to the research hypothesis The null hypothesis is true The null hypothesis is false
- Several recent studies have suggested that people who suffer from abnormally high blood pressure can benefit from regular exercise. She conducts a small sample of 3 random patients with high blood pressure and measures blood pressure before and after the exercise program. Subject Before After 1 155 133 2 160 140 3 145 120 Conduct a test to see if the claim is supportive. State the hypotheses from the previous problem. (high blood pressure problem)The U.S. Department of Labor stated that the national unemployment rate was 4.9%. Of a sample of 90 people in one city, 5.2% were unemployed. Can the city conclude that their unemployment rate is the same as the national average? Do we reject the null hypothesis? (Answer on Excel)What are the two decisions that you can make from performing a hypothesis test? What are the two decisions that you can make from performing a hypothesis test? Select all that apply. A. reject the alternative hypothesis B. reject the null hypothesis O C. accept the alternative hypothesis O D. fail to reject the null hypothesis OE. make a type Il error make a type I error O G. accept the null hypothesis O H. fail to reject the alternative hypothesis
