-Find the correct null hypothesis and for each correct alternative hypothesis 7. Suppose you hear a claim that the average score on a national exam is 78. You think the average is higher than that, and your sample of 100 students produces an average of 75. What are the null and alternative hypotheses?
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- Abigail, who works for a region's department of health, is looking for evidence that the percentage of adults in the region who are current smokers has decreased from 15.8% in 2015, She gathers a random sample of adults in the region and asks each individual if he or she currently smokes. Abigail found that 40 of the 277 adults who were surveyed are current smokers. What are the null and alternative hypotheses for this hypothesis test? Select the correct answer below: O Ho: p0.158 Ha : p=0.158 0 Ho : p= 0.158 Ha: p> 0.158 Ho : p: 0.158 Ha p0.158 10 ĺHo:p=0.158 Ha: p0.158Last year's mean hourly wage (in dollars) for all hospital clerical workers in a large state was 8. An administrator for the state believes that this year's mean hourly wage for hospital clerical workers is greater than last year's mean. She hires statisticians to sample a number of hospital clerical workers and to carry out a hypothesis test. State the null hypothesis H, and the alternative hypothesis H, that would be used for this test. H. 文 H. OO ロ=ロ ローロ-Find the correct null hypothesis and for each correct alternative hypothesis 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?
- A news article that you read stated that 56% of voters prefer the Democratic candidate. You think that the actual percent is larger. 142 of the 236 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.10 level of significance? For this study, we should use The null and alternative hypotheses would be: Ho: (please enter a decimal) H1: (Please enter a decimal) The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is αα Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest the populaton proportion is significantly larger 56% at αα = 0.10, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is larger 56% The data suggest the population proportion is not significantly larger 56% at αα = 0.10, so…The graduation rate from high school in a certain county is 76%. A school in that county wants to know if its graduation rate is significantly lower than the county rate. They take a random sample of 300 of the seniors who graduated last year, and find that 223 out of those 300 graduated. What set of hypotheses should be tested in this case?16% of all college students volunteer their time. Is the percentage of college students who are volunteers different for students receiving financial aid? Of the 398 randomly selected students who receive financial aid, 56 of them volunteered their time. What can be concluded at the a = 0.01 level of significance? a: For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer (please enter a decimal) H₁: ? Select an answer ✓ (Please enter a decimal) c. The test statistic ?v= (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) d. The p-value =
- You may need to use the appropriate appendix table or technology to answer this question. In 2012, seventy percent of Canadian households had an internet connection. A sample of 320 households taken in 2013 showed that 76% of them had an internet connection. We are interested in determining whether or not there has been a significant increase in the percentage of the Canadian households that have internet connections. (a) State the null and alternative hypotheses to be tested. (Enter != for as needed. Let p be the proportion of all Canadian households with internet connections.) H₂₂: H₂: (b) Compute the test statistic. (Round your answer to two decimal places.) (c) The null hypothesis is to be tested at the 5% level of significance. Determine the critical value(s) for this test. (Round your answer(s) to two decimal places. If the test is one-tailed, enter NONE for the unused tail.) test statistic s test statistic 2 (d) What do you conclude? O Do not reject H. We can conclude that there…-Find the correct null hypothesis and for each correct alternative hypothesis 3. Suppose you hear a claim that the average score on a national exam is 78. You think the average is higher than that. Set up your null and alternative hypotheses.Are freshmen psychology majors less likely to change their major before they graduate compared to freshmen business majors? 355 of the 641 freshmen psychology majors from a recent study changed their major before they graduated and 404 of the 674 freshmen business majors changed their major before they graduated. What can be concluded at the = 0.05 level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer H1: Select an answer Select an answer Select an answer Select an answer Select an answer (please enter a decimal) (Please enter a decimal) b. The test statistic ? C c. The p-value = d. The p-value is ? Q e. Based on this, we should Select an answer the null hypothesis. f. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) > Next Question (Please show your answer to 4 decimal places.) O The results are statistically insignificant at a = 0.05, so there is statistically…
- A college professor states that this year's entering students appear to be smarter than entering students from previous years. The college's records indicate that the mean IQ for entering students from earlier years is 110.4. Suppose that we want to sample a small number of this year's entering students and carry out a hypothesis test to see if the professor's statement can be supported. State the null hypothesis H0 and the alternative hypothesis H1 that we would use for this test. H0= H1=A recent study showed that in a random sample of 100 people, 30% had visited Worlds of Fun. In another random sample of 150 people 24% had visited Knott’s Berry Farm. At ∝ = 0.05 are the proportions of people who visited each park different? The samples were independent. In a two sample hypothesis test the p-value was 0.2917. In this test your decision would be to reject the null hypothesis fail to reject the null hypothesis accept the alternate hypothesis as true none of the aboveplease answer g, h, i
