The following table contains observed frequencies for a sample of 200. Column Variable Row Variable A в P 30 46 65 Q 20 24 15 Test for independence of the row and column variables using a = 0.05 . Compute the value of the x test statistic (to 2 decimals). Use Table 3 of Appendix B to find the p-value. The p-value is - Select your answer - What is your conclusion? Select your answer
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- The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 1414 days of application. To test the claim, 10 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participant’s eyes is recorded before and after the 14 days of treatment. The following table displays the results. Test the claim at the 0.01 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 1 and let women after the treatment be Population 2. Number of Fine Lines and Wrinkles Before 13 14 10 15 15 9 10 14 9 10 After 11 14 11 14 14 8 11 12 5 7 Step 2 of 3 : Compute the value of the test statistic. Round your answer to three decimal places. Step 3 of 3: Reject or fail? Is there enough evidenceThe data in the table below presents the hourly quantity of production for three lines of production processes over the first 4 days in XYZ Company. Answer the questions based on the Excel Output given in the picture below. State the null and alternative hypothesis for single factor ANOVA. State the decision rule (α = 0.05). Calculate the test statistic. Make a decision.Researchers conducted a study investigating the number of viralinfections people contracted as a function of their stress over a 6-month period. Use the provided steps to conduct a one-factor between-subjects ANOVA that test whether there are any differences in number of infections across the four conditions.a. State the hypotheses. b. Determine the critical value for an alpha level of 0.05.
- list all the variables (listed in the rows) that showed significant associations with participants' sex (male/female) using the p-values listed in the corresponding p-value column (significance was less or equal to alpha 0.05)An agriculture company wants to determine if a new fertilizer has a significant effect on crop yields. The null hypothesis is that the fertilizer has no effect on crop yields, meaning that the average yield with the fertilizer is equal to the average yield without the fertilizer. The company conducts an ANOVA test and obtains an F-statistic of 3.2 and a numerator degrees of freedom of 3 and denominator degrees of freedom of 20. What is the p-value of the hypothesis test?The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 14 days of application. To test the claim, 10 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participants eyes is recorded before and after the 14 days of treatment. The following table displays the results. Test the claim at the 0.02 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 2. Before: 10, 11, 14, 11, 9, 11, 12, 14, 11, 14 After: 8, 11, 13 , 11, 5, 7, 13, 12, 8, 10 Question 1 : Compute the value of the test statistic. Round your answer to three decimal places. Additionally Question 2: Draw a conclusion and interpret the decision.
- The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 1414 days of application. To test the claim, 1010 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participant’s eyes is recorded before and after the 1414 days of treatment. The following table displays the results. Test the claim at the 0.050.05 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 1 and let women after the treatment be Population 2. Number of Fine Lines and Wrinkles Before 12 11 10 14 12 9 12 14 9 12 After 13 8 6 14 11 6 13 11 5 11 Step 2 of 3 : Compute the value of the test statistic. Round your answer to three decimal places.The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 14 days of application. To test the claim, 10 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participant’s eyes is recorded before and after the 14 days of treatment. The following table displays the results. Test the claim at the 0.05 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 1 and let women after the treatment be Population 2. Number of Fine Lines and WrinklesBefore 11 14 13 12 15 14 9 11 11 14After 10 14 11 13 13 13 8 12 10 15 Step 1 of 3 : State the n ull and alternative hypotheses for the test. Fill in the blank below. H0Ha: μd=0: μd⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯0 3) draw a conclusion and form a decision (word it like "we…The manufacturer of a new eye cream claims that the cream reduces the appearance of fine lines and wrinkles after just 14 days of application. To test the claim, 10 women are randomly selected to participate in a study. The number of fine lines and wrinkles that are visible around each participant’s eyes is recorded before and after the 14 days of treatment. The following table displays the results. Test the claim at the 0.05 level of significance assuming that the population distribution of the paired differences is approximately normal. Let women before the treatment be Population 1 and let women after the treatment be Population 2. Number of Fine Lines and Wrinkles Before 9 9 10 15 13 9 9 10 9 14 After 6 10 10 12 9 6 9 7 8 14 Copy Data Step 2 of 3 : Compute the value of the test statistic. Round your answer to three decimal places.
- A clinical trial is conducted to compare a new pain relief for arthritis to a placebo. Participants are randomly assigned to receive the new medication or a placebo, and the outcome is pain relief within 30 minutes. The data are shown in Table 7–8. Is there a significant difference in the proportions of patients reporting pain relief? Run the test at a 5% level of significance. (Use Excel; compute the overall proportion, then the z-test statistic and finally the p-value using norm.dist.)One researcher is comparing scores from two treatment groups using independent samples t test. He would like to know whether the assumption of homogeneity of variance is met. Please first explain what is homogeneity of variance. Then conduct the Hartley’s F-max test to examine this assumption (each group has 6 participants, s2 in group 1 is 20, and s2 in group 2 is 15, set alpha level at .05). Finally, based on the result of the Hartley’s F-max test, how should this researcher estimate the standard error in the independent samples t test?In a random sample of males, it was found that 25 write with their left hands and 222 do not. In a random sample of females, it was found that 68 write with their left hands and 450 do not. Use a 0.01significance level to test the claim that the rate of left-handedness among males is less than that among females. Identify the test statistic. z enter your response here Identify the test statistic. z=enter your response here