Explain why the null hypothesis is rejected when the test value exceeds or is equal to the critical value
Explain why the null hypothesis is rejected when the test value exceeds or is equal to...
9. (Bonus: 5 points) A researcher rejected a null hypothesis in a test when α 5%. For which of the following significance levels the test will be rejected in any situations? Explain. a. α 0.15% b. 2.5% c. α# 0.02% d. α 20%
Identify the null hypothesis, alternative hypothesis, critical value, test statistic, conclusion about the null hypothesis, and final conclusion that addresses the original claim. 22) A nationwide study of American homeowners revealed that 64% have one or more lawn mowers. A lawn equipment manufacturer, located in Omaha, feels the estimate is too low for households in Omaha. Can the value 0.64 be rejected if a survey of 490 homes in Omaha yields 331 with one or more lawn mowers? Use =...
If p-value is 0.11 the null hypothesis can be rejected at a = .05. the null hypothesis can be rejected at a =.10. the null hypothesis can be rejected at a =.01. none of the above. 问题8 19 The test statistic for testing significance of the one regression coefficient follows Normal Distribution. Student's t-distribution. O F distribution. Chi-squared distribution. 问题9 19 The test statistic for testing significance of the overall regression model follows Normal distribution. Student's t-distribution. F distribution. Chi-squared...
suppose you test null hypothesis Ho : μι_Ha versus Ha : μ.μ2 , software gives 12.3 degrees of freedom for your t test. Answer the following questions: a) If test statistics t-2.25 5, use the rejection region to decide if Ho be rejected or not at a .0.05? Include a sketch, clearly label critical value(s) and rejection and nonrejection regions. b) If test statistics was t-1.14, use a 0.05, compute the p-value and decide if Ho b rejected or not...
A friend has performed a significance test of the null hypothesis that two means are equal. His report states that the null hypothesis is rejected in favor of the alternative the first mean is larger than the second. In a presentation on his work, he notes that the first sample mean was larger than the second mean and this is why he chose this particular one-sided alternative. (a) Explain what is wrong with your friend's procedure and why. We should...
If the null hypothesis is rejected when the null hypothesis is true, what type of error, if any, has been made? Type I error Type II error Correct decision Type error
(a) When a null hypothesis is rejected, there is risk of committing which type of error? (b) When a null hypothesis is not rejected, there is risk of committing which type of error?
Test the Hypotheses Below Null Hypothesis: Mean Student Debt in 2011 is equal to Mean Student Debt in 2007 Alternative Hypothesis: Mean Student Debt in 2011 is not equal to Mean Student Debt in 2007 Alpha Level = 0.05 F-Test Two-Sample for Variances Variable 1 Variable 2 Mean 3925.76 2876.82 Variance 222129.8188 140278.3547 Observations 50 50 df 49 49 F 1.583493186 P(F<=f) one-tail 0.055512364 F Critical one-tail 1.607289463 Run an F-test for two sample variances using an alpha level of...
If the null hypothesis is rejected when the null hypothesis is true, what type of error, if any, has been made? O O O O Correct decision Type Il error Type I error Type error Click to select your answer.
For which of the given P-values would the null hypothesis be rejected when performing a level 0.05 test?