# Deliverable 5 – Hypothesis Tests for Two Samples

Deliverable 5 – Hypothesis Tests for Two SamplesCompetencyFormulate and evaluate hypothesis tests for population parameters based on sample statistics using both Critical Regions and P-Values, and be able to state results in a non-technical way that can be understood by consumers of the data instead of statisticians.Student ProfileYou are a statistician working for a drug company. A few new scientists have been hired by your company. They are experts in pharmacology, but are not experts in doing statistical studies, so you will explain to them how statistical studies are done when testing two samples for the effectiveness of a new drug. The two samples can be dependent or independent, and you will explain the difference. Concept being Studied Your focus is on hypothesis tests and confidence intervals for two populations using two samples, some of which are independent and some of which are dependent. These concepts are an extension of hypothesis testing and confidence intervals which use statistics from one sample to make conclusions about population parameters.What to SubmitYour research and analysis should be presented on the Word document provided. All calculations should be provided on a separate Excel workbook that should be submitted to your boss as well.Hi Elisha, I believe that I have emailed you on multiple occasions about the Excel file needed to be submitted with all assignments. It appears that you have only submitted one document for Deliverable 4. Please note that you must submit BOTH an Excel document (that shows your work) and a Word document (that explains your work). Your current submission has been reverted back to a draft. Please attach both documents to Deliverable 4 and then resubmit your assignment to be graded. If you have any questions on the assignment or requirements, please email your Instructional Faculty Member: Allisha Wise (she is ccâ€™d on the email). Please be sure to submit the Excel file with EVERY submission for grading. This is the messages I have been getting from my professor every work I have turn in. I got a C. The word document needed for this work is in the next page. Deliverable 05 â€“ WorksheetDeliverable 05 â€“ WorksheetInstructions: The following worksheet describes two examples â€“ one is an example for independent samples and the other one for dependent samples. Your job is to demonstrate the solution to each scenario by showing how to work through each example in detail. You are expected to explain all of the steps in your own words. Independent samples:One of our researchers wishes to determine whether people with high blood pressure can reduce their systolic blood pressure by taking a new drug we have developed. The sample data is shown below, where x Ì…_1 represents the mean blood pressure of the treatment group and x Ì…_2 represents the mean for the control group. Use a significance level of 0.01 and the critical value method to test the claim that the drug reduces the blood pressure. We do not know the values of the population standard deviations. Treatment Group Control Groupn1 75 n2 70x Ì…_1 186.7 x Ì…_2 201.9s1 37.5 s2 39.8 Write the hypotheses in symbolic form, determine if the test is right-tailed, left-tailed, or two tailed and explain why.Answer and Explanation â€ƒ Calculate the critical value and the test statistic.Answer and Explanation Make a decision about the null hypothesis and explain your reasoning, then make a conclusion about the claim in nontechnical terms.Answer and Explanation Dependent samplesThis same new drug was tested on another group, but this time the test was done before the drug was administered, and then tested after the drug was given to the same group. The results are shown in the table below:Subject Before After1 199 1902 174 1723 195 1874 170 1675 179 1696 182 1817 183 1768 208 1939 185 17910 155 14511 169 16612 208 197Use the data above with a significance level of 0.05 to test the claim that for the populations of blood pressures before and after the drug, the differences have a mean greater than 0 mm Hg (so the claim is that the drug helps lower the blood pressure). Use the P-Value method to determine whether or not to reject the null hypothesis and state your conclusion. Write the hypotheses in symbolic form, determine if the test is right-tailed, left-tailed, or two tailed and explain why.Answer and Explanation Calculate the test statistic and the P-Value.Answer and Explanation Make a decision about the null hypothesis and explain your reasoning, then make a conclusion about the claim in nontechnical terms.Answer and Explanation

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