Clinical trials involved treating flu symptons with a new medicine.  Among 1123 patients treated with the medicine, 90 experienced a side effect of dizziness.  The claim is that the rate of dizziness is less than the 10% rate experienced by flu patients given a placebo.  Find a test statistic of the proportion.

A study is designed to investigate whether there is a difference in response to various treatments in patients with Rheumatid arthritis. The outcome is the patient's self reported effect of treatment. The data are shown below. Is there a significnt difference in effect of treatment? Run the test at a 5% level of significance.                                  Symptoms worsened     no effect    symptoms       total                                                                                             improved Treatment 1                        22                          14                  14                50 Treatment 2                        14                           15                  21               50  Treatment 3                         9                             12                 29               50

PLEASE ANSWER ASAP: A case-control study was conducted to evaluate the relationship between physical activity and coronary heart disease (CHD) in men. A total of 406 men newly diagnosed with CHD were included together with 406 men of similar ages who did not have CHD. The risk of CHD (measured by the OR) was higher among men who were inactive or only moderately active (collectively called ‘inactive’) than among those who were physically active: (See attached image) Odds ratio for inactive men compared to active men= (299 x 136)/(270 x 107)=1.41Suppose there is no misclassification in these data.What would the observed OR have been... 1. If 20% of all the inactive men had been misclassified as active?  2. If 10 % of inactive cases had been misclassified as active?

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 + 0

You recently had a cholesterol panel completed and see that the results for your High Density Lipoprotien (HDL) level comes back with z = -1.7 among people of your stature. Your doctor is going to review the results with you but based on what you know about z-scores you can infer: a.The average person of your stature is 1.7 deviations below you.   b.Your HDL level is slightly below average. c.The score is negative so this will be good news. d.Your HDL level is extremely low for a person of your stature.

An independent-measures research study uses a total of 40 participants to compare two treatment conditions. What is the df value for the t statistic for this study?​   Question options: a. ​39 b. ​19 c. ​38 d. ​18

You conducted a study to assess the effect of smoking on systolic blood pressure. The results showed that there was a significant association between the two variables, with an odds ratio of 1.5. Explain this finding to someone who has no background in epidemiologic research.

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The old variety of a plant has 70% pink flowers. A new variety is developed. In a random sample of 93 plants from the new variety, 59 had pink flowers. Test the claim that the percent of plants with pink flowers for the new variety is different than 70%. Use a 0.10 level of significance.   Question 6 options:   DO NOT Reject H0 Using a 0.10 level of significance there is not evidence to say the proportion of pink flowers is different than 0.70   Reject H0 Using a 0.10 level of significance there is evidence to say the proportion of pink flowers is not different than 0.70

What is the difference from a controlled variable and the control in a scientific experiment?