A one-sample z-test for a population mean is to be performed. True or false: The larger...
A one-sample z-test for a population mean is to be performed. True or false: The larger the
P-value, the stronger the evidence against the null hypothesis?
Homework Answers
false
(since p value is probabiltiy of getting as or more extreme test statistic if null is true, small p value provide evidence against null)
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A one-sample z-test for a population mean is to be
performed. True or false: The larger...
Statistics Homework Questions - Help! Please give correct answers and explanations! Thank you! 1. True or False: One advantage of using classical approach over P-values approach in hypothesis testing...
Statistics Homework Questions - Help! Please give correct answers and explanations! Thank you! 1. True or False: One advantage of using classical approach over P-values approach in hypothesis testing is that classical approach provide information regarding the strength of the evidence. 2. True or False: P-values are interpreted the same way regardless of the type of hypothesis test being performed. The larger the P-value, the stronger the evidence against the statement in the null hypothesis. 3. True or False: The...
A one-sample z-test for a population mean is performed. Suppose that the P-value for the test...
A one-sample z-test for a population mean is performed. Suppose that the P-value for the test is 0.04. For what significance levels (values of a) can the null hypothesis be rejected? For a = 0.04 For all values of a greater than or equal to 0.04 For a = 0.05, 0.10 For all values of a smaller than 0.04
A sample mean, sample standard deviation, and sample size are given. Use the one meant test...
A sample mean, sample standard deviation, and sample size are given. Use the one meant test to perform the required hypothesis test about the mean, , of the population from which the sample was drawn. Use the P-value approach. Also, assess the strength of the evidence against the null hypothesis. x-22,298, s=14200, n = 17, HO: P = 30,000, Ha# 30,000 a -0.05. Test statistic: 224. P.value 0.0200. Reject the null hypothesis. There is sufficient evidence to conclude that the...
True or False. (Determining sample size n for the purpose of estimating mean) For a specified...
True or False. (Determining sample size n for the purpose of estimating mean) For a specified sampling error (SE) and given population standard deviation, increase in the confidence level (1-alpha) will lead to a larger sample sizen. True False True or False The smaller the p-value associated with a test of hypothesis, the stronger the support for the research hypothesis. True False
A sample of 14 from an approximately normal population is used to test Ho: p =...
A sample of 14 from an approximately normal population is used to test Ho: p = 5 versus H1: u> 5. If the p-value of this test is 0.0329, which of the following is the correct decision and conclusion at the a = 0.05 level? 2. Do not reject the null hypothesis concluding that there is no evidence the true mean is larger than 5. • Reject the null hypothesis concluding that there is evidence that the true mean is...
(1 point) A statistical investigation is conducted to see if the mean of a population of...
(1 point) A statistical investigation is conducted to see if the mean of a population of values is equal to 367, or Ho :,-367 HA : #367. A random sample of n = 136 values is taken from this population of values, producing a test statistic of Teale-一0.643 and a P-value of 0.5215. Choose the correct interpretation of the P-value. OA. If the null hypothesis is true, the chance of another sample producing stronger evidence against the null hypothesis is...
In a one-sample z test, the smaller the P-value, Select one: a. the stronger the evidence...
In a one-sample z test, the smaller the P-value, Select one: a. the stronger the evidence to reject the null hypothesis b. the narrower the width of the 95% confidence interval c. the wider the width of the 95% confidence interval d. the stronger the evidence to reject the alternative hypothesis
true or false 11. When the level of confidence and the sample size remain the same,...
true or false
11. When the level of confidence and the sample size remain the same, a confidence interval for a population mean y will be narrower, when the sample standard deviation s is smaller than when s is larger. Chapter 10 12. The closer is the hypothesized mean is from the actual mean the higher is the power of the test. 13. The manager of the quality department for a tire manufacturing company wants to know the average tensile...
A sample mean, sample size and population standard deviation are provided below. Use the one-mean z-test...
A sample mean, sample size and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the 10% significance level. x=27, n=25, =8, Ho =25 Hà #25 The test statistic is z= (Round to two decimal places as needed) Identify the critical value(s) Select the correct choice below and fill in the answer box within your choice. (Round to three decimal places as needed) O A. The critical values are +2/2+ OB. The...
A random sample of 100 observations from a population with standard deviation 76 yielded a sample...
A random sample of 100 observations from a population with standard deviation 76 yielded a sample mean of 114. Complete parts a through c below. a. Test the null hypothesis that u = 100 against the alternative hypothesis that u > 100, using a = 0.05. Interpret the results of the test. What is the value of the test statistic? und to two decimal places as needed.) Find the p-value. p-value = (Round to three decimal places as needed.) State...
A one-sample z-test for a population mean is performed. Suppose that the P-value for the test is 0.04. For what significance levels (values of a) can the null hypothesis be rejected? For a = 0.04 For all values of a greater than or equal to 0.04 For a = 0.05, 0.10 For all values of a smaller than 0.04
A sample mean, sample standard deviation, and sample size are given. Use the one meant test to perform the required hypothesis test about the mean, , of the population from which the sample was drawn. Use the P-value approach. Also, assess the strength of the evidence against the null hypothesis. x-22,298, s=14200, n = 17, HO: P = 30,000, Ha# 30,000 a -0.05. Test statistic: 224. P.value 0.0200. Reject the null hypothesis. There is sufficient evidence to conclude that the...
True or False. (Determining sample size n for the purpose of estimating mean) For a specified sampling error (SE) and given population standard deviation, increase in the confidence level (1-alpha) will lead to a larger sample sizen. True False True or False The smaller the p-value associated with a test of hypothesis, the stronger the support for the research hypothesis. True False
A sample of 14 from an approximately normal population is used to test Ho: p = 5 versus H1: u> 5. If the p-value of this test is 0.0329, which of the following is the correct decision and conclusion at the a = 0.05 level? 2. Do not reject the null hypothesis concluding that there is no evidence the true mean is larger than 5. • Reject the null hypothesis concluding that there is evidence that the true mean is...
(1 point) A statistical investigation is conducted to see if the mean of a population of values is equal to 367, or Ho :,-367 HA : #367. A random sample of n = 136 values is taken from this population of values, producing a test statistic of Teale-一0.643 and a P-value of 0.5215. Choose the correct interpretation of the P-value. OA. If the null hypothesis is true, the chance of another sample producing stronger evidence against the null hypothesis is...
true or false
11. When the level of confidence and the sample size remain the same, a confidence interval for a population mean y will be narrower, when the sample standard deviation s is smaller than when s is larger. Chapter 10 12. The closer is the hypothesized mean is from the actual mean the higher is the power of the test. 13. The manager of the quality department for a tire manufacturing company wants to know the average tensile...
A sample mean, sample size and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the 10% significance level. x=27, n=25, =8, Ho =25 Hà #25 The test statistic is z= (Round to two decimal places as needed) Identify the critical value(s) Select the correct choice below and fill in the answer box within your choice. (Round to three decimal places as needed) O A. The critical values are +2/2+ OB. The...
A random sample of 100 observations from a population with standard deviation 76 yielded a sample mean of 114. Complete parts a through c below. a. Test the null hypothesis that u = 100 against the alternative hypothesis that u > 100, using a = 0.05. Interpret the results of the test. What is the value of the test statistic? und to two decimal places as needed.) Find the p-value. p-value = (Round to three decimal places as needed.) State...
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