Currently Samsung ships 22.6 percent of the organic light-emitting diode (OLED) displays in the world. Let S be the event that a randomly selected OLED display was made by Samsung. (a) Find P(S). (Round your answer to 3 decimal places.) P(S) (b) Find P(S). (Round your answer to 3 decimal places.) P(S)

Pi- P2 Z. = %3D SE Suppose a drug company is developing a vaccine, designed to protect against a particular virus. The company states that the vaccine will be equally effective for men and women. In its initial stage, a researcher selects a random sample of 200 men and 100 women independently. At the end of the study, 15 of the men and 10 of the women showed symptoms of the virus after taking the vaccine. Is there enough evidence to conclude that there is a significant difference in the proportions of men and women who show symptoms of the virus after taking the vaccine? (a) State the appropriate hypotheses to answer this question. (b) Compute the test-statistic. (c) (i) Calculate the p-value. (ii) Interpret the p-value you have found. (d) State your conclusion in context of the situation. Page 1 135

Question(14): A researcher wanted to know whether children  who live in two different neighbourhood (Willowdale and Forresthill) got different amount of excerise. Children were randomly selected from the two neighbourhoods (40 in each). and filled out the daily activity report to measure their excerise. The number of minutes of excerise  were tallied and recorded. The  The researcher then  conducted an independent  sample t test  using MS-EXCELL. The result are shown in the image below. Inspect the MS- EXCELL output.Did the researcher conduct their t test assuming equal variance.? Write out Step 5 by including both the formal answer and the conclusion. The five steps are: Step 1:State the hypotheses  and identify the claim. Step 2: Compute the test value Step 3: Compute the critical value. Step 4:Make the decision (reject or not reject) Step 5:Summaize the results. Note: you only need to submit step 5, and round snswer to decimal places MS-EXCELL output:…

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