What is the purpose for post tests? Question 19 options: To determine whether or not a Type I error was committed To determine how much difference exists between the treatments To determine which treatments are significantly different None of the above
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- A research company wants to determine whether there is a difference in effectiveness of a brand- name ibuprofen and generic ibuprofen. What are the appropriate hypotheses for this testing scenario? Let µ equal the mean of the effectiveness of brand-name ibuprofen and µ2 equal the mean of the effectiveness of generic ibuprofen. O Ho: H1 - H2 = 0 Hạ: H1 - H2 > 0 O Ho: H1 - µ2 = 0 Hạ: H1 - H2 0 O Ho: X1 - X2 = 0 Hạ: X1 - X2 + 0A research company wants to determine whether there is a difference in effectiveness of a brand-name ibuprofen and generic ibuprofen. What are the appropriate hypotheses for this testing scenario? Let μ₁ equal the mean of the effectiveness of brand-name ibuprofen and μ2 equal the mean of the effectiveness of generic ibuprofen. O Ho: H1 - H2 = 0 Ha: H1-H₂> 0 O Ho: H1-H2 = 0 Ha: H1 - H₂ 0 O Ho: X1 - X2 = 0 Ha: X1-X₂ #02. The sensitivity (True Positive) and specificity (True Negative) for a diagnostic test (T) are .99 and .95 respectively. The prevalence of the disease (D) is .001. Find the predictive value of a positive test result.
- A variable that is related to either the response variable or the predictor variable or both, but which is excluded from the analysis is a, Select one: a. quality variable. b. lurking variable. c. random variable. d. discrete variable.Christopher wants to compare whether those that study before they go to bed or during the day perform better on an exam. What type of test would be appropriate to evaluate the results of his study? one-way ANOVA independent t-test dependent t-test one-sample t-testTwenty students were randomly asked about their grades in English and Social Studies. (check attached photo) 1. What is the response variable in the study? A. grade in English B. grade in Social Studies C. either A or B D. neither A or B 2. What is the explanatory variable in the study? A. grade in English B. grade in Social Studies C. either A or B D. neither A or B 3. If the predictor variable is the grade in English, what is the value of the slope estimate? (Write in the nearest hundredths) 4. Interpret the value of the slope if the predictor variable is the grade in English. 5. If the predictor variable is the grade in English, what is the value of the y-intercept? 6. Interpret the value of the y-intercept if the predictor variable is the grade in English. 7. Write the regression line equation that predicts a student's grade in English?
- . Calculate the Z-test statistic using the standard error from part a. z=The Ministry of Health is interested in determining patients’ response time to a new influenza cure based on the length of time (in hours) they were ill before receiving any of the two drugs. The results of the trial are given in the table(image file) below: A. Please conduct the appropriate statistical analyses to compare the response time for the two drugs while controlling for length of time they were ill. Clearly outline all your tests. B. What is the conclusion? C. Has the assumptions of normality and homogeneity of variance been met? D. The JASP output and input of all the statistical analyses performedWhat is the purpose for post hoc tests? Select one: a. to determine which treatments are significantly different b. to determine whether or not the sample is normally distributed c. to determine how much difference exists between the treatments d. to determine whether or not a Type I error was committed
- The Ministry of Health is interested in determining patients’ response time to a new influenza cure based on the length of time (in hours) they were ill before receiving any of the two drugs. The results of the trial are given in the table(image file) below: A. Please conduct the appropriate statistical analyses to compare the response time for the two drugs while controlling for length of time they were ill. Clearly outline all your tests. B. What is the conclusion? C. Has the assumptions of normality and homogeneity of variance been met?Answer the given problem. Use the steps in hypothesis testing when presenting the results. A health researcher is interested in comparing 3 methods of weight loss: low calorie diet, low fat diet and high exercise regimen. He selected 15 moderately overweight subjects and randomly assigned 5 to each weight-loss program. The following weight reductions (in lbs) were observed after a one-month period. Test the hypothesis that the extent of weight reduction does not differ by type of weight-loss program. Low Fat : 7 7 5 4 6 Low Calorie : 7 8 8 9 5 High Exercise Regimen : 7 9 7 8 8A researcher believes that gender and having an older sibling affects language learning in preschoolers. He has 24 preschoolers, 12 Male and 12 female and half of each gender have an older sibling and half do not. He measures their language development. The results are included in the following 2 X 2 ANOVA table. Using ?α =.05 state the conclusion in APA format.