The four elements described in the previous two questions (null/alternative hypotheses, test statistics, rejection regions, and...
The four elements described in the previous two questions (null/alternative hypotheses, test statistics, rejection regions, and p-values) constitute the steps of performing a hypothesis test. Explain the importance of performing these steps in order, and the dangers of performing them out of order.
Homework Answers
p-value and rejection regions depends on alternate hypothesis
hence you can't perform them before hypothesis
p-value is calculated using test statistics amd alternate hypothesis
we reject the null hypothesis or fail to reject the null hypothesis depending on p-value
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The four elements described in the previous two
questions (null/alternative hypotheses, test statistics, rejection
regions, and...
For a simple null hypotheses versus a simple alternative hypothesis, two tests found different rejection regions....
For a simple null hypotheses versus a simple alternative hypothesis, two tests found different rejection regions. One rejection region is C1={X⎯⎯⎯:X¯≤0.14 or X¯≥1.14} and the other is C2={X⎯⎯⎯:X¯≤0.1 or X¯≥1.07}. Both tests have significance level of 0.045. What can you say about the power of the two tests? A. The test based on C2 has higher power since there are more values that would be rejected. B. We don't have enough information to compare the power of the tests. C....
STEP 2 State the Null and Alternative (Research) hypotheses NULL Hypothesis ALTERNATIVE Hypothesis Is this a...
STEP 2 State the Null and Alternative (Research) hypotheses NULL Hypothesis ALTERNATIVE Hypothesis Is this a one or two tailed test (if a one tailed test, what direction)? STEP 3 Define the elements of the problem What is the population or populations of interest? What is the sample? 3. The President claims that 100,000 jobs were created last month. You don't believe this claim is true, so you examine a sample of 1,000 records from the Bureau of Labor Statistics...
The null and alternative hypotheses for a hypothesis test of the difference in two population means...
The null and alternative hypotheses for a hypothesis test of the difference in two population means are: Null Hypothesis: Alternative Hypothesis: Notice that the alternative hypothesis is a two-tailed test. Suppose ttest_ind method from scipy module is used to perform the test and the output is (-1.99, 0.0512). What is the P-value for this hypothesis test? Select one. Question 4 options: 0.0512 1.99 0.0256 -1.99
The null and alternative hypotheses for a hypothesis test of the difference in two population means...
The null and alternative hypotheses for a hypothesis test of the difference in two population means are: Null Hypothesis: Alternative Hypothesis: Notice that the alternative hypothesis is a one-tailed test. Suppose ttest_ind method from scipy module is used to perform the test and the output is (3.25, 0.0043). What is the P-value for this hypothesis test? Select one. Question 2 options: 3.25 -3.25 0.0043 0.00215
Consider the following null and alternative hypotheses: Ho: p=0.16 He: p <0.16 These hypotheses O a)...
Consider the following null and alternative hypotheses: Ho: p=0.16 He: p <0.16 These hypotheses O a) indicate a one-tailed test with a rejection area in the right tail b) are not mutually exclusive O c) indicate a two-tailed test d) are established incorrectly e) indicate a one-tailed test with a rejection area in the left tail
The p-value associated with the null and alternative hypotheses for the two sample t-test is 0.045,...
The p-value associated with the null and alternative hypotheses for the two sample t-test is 0.045, choose the best conclusion: EXPLAIN a. The alternative hypothesis is true. b. The null hypothesis is true. c. There is suggestive evidence that the average tip for good weather days is greater than the average tip for bad weather days. d. There is no evidence that the average tip for good weather days is greater than the average tip for bad weather days.
To perform a test of the null and alternative hypotheses shown below, random samples were selected...
To perform a test of the null and alternative hypotheses shown below, random samples were selected from the two normally distributed populations with equal variances. The data are shown below. Test the null hypothesis using an alpha level equal to 0.01. Sample from Population 1 Sample from Population 2 31 39 28 34 35 35 40 38 32 32 36 26 35 44 33 28 35 31 31 34 Ho: μ1-uz"0 Determine the rejection region for the test statistic t....
Suppose you test null hypothesis Ho : μι_Ha versus Ha : μ.μ2 , software gives 12.3 degrees of fre...
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...
Consider the following null and alternative hypotheses. &
Consider the following null and alternative hypotheses. Ho: p = 0.16 Ha: p ≠ 0.16 These hypotheses _______________. indicate a one-tailed test with a rejection area in the right tail indicate a one-tailed test with a rejection area in the left tail indicate a two-tailed test are established incorrectly are not mutually exclusive The diameter of 3.5 inch diskettes is normally distributed. Periodically, quality control inspectors at Dallas Diskettes randomly select a sample of 16 diskettes. If the mean diameter of the...
For the following hypothesis test, determine the null and alternative hypotheses. Also, classify the hypothesis test...
For the following hypothesis test, determine the null and alternative hypotheses. Also, classify the hypothesis test as two tailed, left tailed, or right tailed The mean local monthly bill for cell phone users in this country was $43.56 in 2001. A hypothesis test is to be performed to determine whether last year's mean local monthly bill for cell phone users has decreased from the 2001 mean of $43.56 Choose the correct null and alternative hypotheses below OA. Ho : μ...
STEP 2 State the Null and Alternative (Research) hypotheses NULL Hypothesis ALTERNATIVE Hypothesis Is this a one or two tailed test (if a one tailed test, what direction)? STEP 3 Define the elements of the problem What is the population or populations of interest? What is the sample? 3. The President claims that 100,000 jobs were created last month. You don't believe this claim is true, so you examine a sample of 1,000 records from the Bureau of Labor Statistics...
Consider the following null and alternative hypotheses: Ho: p=0.16 He: p <0.16 These hypotheses O a) indicate a one-tailed test with a rejection area in the right tail b) are not mutually exclusive O c) indicate a two-tailed test d) are established incorrectly e) indicate a one-tailed test with a rejection area in the left tail
To perform a test of the null and alternative hypotheses shown below, random samples were selected from the two normally distributed populations with equal variances. The data are shown below. Test the null hypothesis using an alpha level equal to 0.01. Sample from Population 1 Sample from Population 2 31 39 28 34 35 35 40 38 32 32 36 26 35 44 33 28 35 31 31 34 Ho: μ1-uz"0 Determine the rejection region for the test statistic t....
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...
For the following hypothesis test, determine the null and alternative hypotheses. Also, classify the hypothesis test as two tailed, left tailed, or right tailed The mean local monthly bill for cell phone users in this country was $43.56 in 2001. A hypothesis test is to be performed to determine whether last year's mean local monthly bill for cell phone users has decreased from the 2001 mean of $43.56 Choose the correct null and alternative hypotheses below OA. Ho : μ...
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