A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, witha credit score over 700 considered to be a quality credit risk. According to a survey, the mean credit score is 705.8. A credit analyst wondered whether high-incomeindividuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 37 high-income individuals and found the samplemean credit score to be 721.3 with a standard deviation of 81.9. Conduct the appropriate test to determine if high-income individuals have higher credit scores at thea = 0.05 level of significance.State the null and alternative hypotheses.Họ: HH1: H(Type integers or decimals. Do not round.)

Answered: Image /qna-images/answer/f3e12b5c-3972-4f25-b388-6c9cebd1aa9b.jpg

Answered: mean credit score to be 721.3 with a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The average American consumes 86 liters of alcohol per year. Does the average college student consume more alcohol per year? A researcher surveyed 11 randomly selected college students and found that they averaged 95.8 liters of alcohol consumed per year with a standard deviation of 20 liters. What can be concluded at the the a= 0.05 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 H₁: ? Select an answer c. The test statistic ? C d. The p-value = e. The p-value is ? a f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) O The data suggest the population mean is not significantly more than 86 at a = 0.05, so there is statistically insignificant evidence to conclude that the population mean amount of alcohol consumed by college students is equal to…
Claim: The mean systolic blood pressure of all healthy adults is less than 122 mm Hg. Sample data: For 269 healthy adults, the mean systolic blood pressure level is 121.74 mm Hg and the standard deviation is 15.02 mm Hg. Complete parts (a) and (b). B.) Identify the null and alternative hypotheses.
The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.05 level of significance that the medicine relieves pain in less than 349 seconds. For a sample of 11 patients, the average time in which the medicine relieved pain was 345 seconds with a standard deviation of 17 seconds. Assume the population distribution is approximately normal. What is the null and alternate hypotheses to test whether the medicine is relieving pain in less time.
Cost of Building a Home According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91per square foot. A random sample of 42new homes indicated that the mean cost was $124.55and the standard deviation was $15. Can it be concluded that the mean cost differs from $117.91, using the 0.05 level of significance? State the hypotheses and identify the claim with the correct hypothesis. :H0 ▼not claim or claim??? :H1▼not claim ot claim??? This hypotheses test is a two tailed or one tailed??? test.
The average price of homes sold in the U.S. in the past year was $220,000. A random sample of 81 homes sold this year showed an average price of $210,000. It is known that the standard deviation of the population is $36,000. At a 5% level of significance, test to determine if there has been a significant decrease in the average price of homes. 1- State the null and alternative hypotheses to be tested 2- Which test do you need to use for this question? 3-Compute the test statistic. What is the value? 4-Determine the critical value for this test. What is the value? 5-Compute the p-value. What is the value? 6- What do you conclude?
A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 435 gram setting. It is believed that the machine is underfilling the bags. A 35 bag sample had a mean of 427 grams. Assume the population standard deviation is known to be 17. A level of significance of 0.05 will be used. State the null and alternative hypotheses.
The average American consumes 86 liters of alcohol per year. Does the average college student consume more alcohol per year? A researcher surveyed 11 randomly selected college students and found that they averaged 95.8 liters of alcohol consumed per year with a standard deviation of 20 liters. What can be concluded at the the a = 0.05 level of significance? a. For this study, we should use t-test for a population mean O b. The null and alternative hypotheses would be: Ho: μ = H₁: μ > O 86 O 86 c. The test statistic (t) = d. The p-value = e. The p-value is ? a f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that ... 1.625 (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) O The data suggest the population mean is not significantly more than 86 at a = 0.05, so there is statistically insignificant evidence to conclude that the population mean amount of alcohol consumed by college students is…
2. Hypothesis: A one hour GRE workshop increases test scores. Sample Data: Mean of 25 people who did workshop = 156 (standard deviation = 8.2); mean of 27 people who did not do workshop = 154 (standard deviation 7.6).
Does it fail to reject or does it reject?
How do I find the Standard Deviation and Sample Mean?
State the null and alternative hypotheses. John, a restaurant owner, suspects that prices of tomatoes in Bury are higher than the rest of Manchester. He finds that the city average price of a certain type of premium tomatoes is £20.9 with standard deviation £0.95. He takes a sample of this type of tomato from 5 local Bury stores and obtains an average price of £22.46.
The average American consumes 97 liters of alcohol per year. Does the average college student consume a different amount of alcohol per year? A researcher surveyed 12 randomly selected college students and found that they averaged 79.1 liters of alcohol consumed per year with a standard deviation of 19 liters. What can be concluded at the the a = 0.05 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 H₁: ? Select an answer ✓ 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 =

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mean credit score to be 721.3 with a standard deviation of 81.9. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the a = 0.05 level of significance. State the null and alternative hypotheses.