Estimation of the Population Mean of Soft Plaque Deposit (Confidence Interval of the Mean). Estimation of the Population Proportion of Soft Plaque Deposit (Confidence Interval of the Proportion).

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This project uses the sample data of the experiment mam-1), shown here. Assume the variable, soft plaque deposit index, is approximately normally distributedl In a study of the oral home care practice and reasons for seeking dental care among individuals on renal dialysis, Agassi, (A-1) studied 90 subjects on renal dialysis. The oral hygiene status of all subjects was examined using a plaque index with a range of O to 3 (O=no soft plaque deposits, 3=an abundance of soft plaque deposits). The following table shows the plaque index scores for all 90 subjects. 1.17; 2.50; 2.00; 2.33; 1.67; 1.33; 1.17; 2.17; 2.17; 1.33; 2.17; 2.00; 2.17; 1.17; 2.50; 2.00; 1.50; 1.50; 1.00; 2.17; 2.17; 1.67; 2.00; 2.00; 1.33; 2.17; 2.83; 1.50; 2.50; 2.33; 0.33; 2.17; 1.83; 2.00; 2.17; 2.00; 1.00; 2.17; 2.17; 1.33; 2.17; 2.50; 0.83; 1.17; 2.17; 2.50; 2.00; 2.50; 0.50; 1.50; 2.00; 2.00; 2.00; 2.00; 1.17; 1.33; 1.67; 2.17; 1.50; 2.00; 1.67; 0.33; 1.50; 2.17; 2.33; 2.33; 1.17; 0.00; 1.50; 2.33; 1.83; 2.67; 0.83; 1.17; 1.50; 2.17; 2.67; 1.50; 2.00; 2.17; 1.33; 2.00; 2.33; 2.00; 2.17; 2.17; 2.00; 2.17; 2.00; 2.17; 1. Compute a sample proportion of your choice (pick a certain index, count how many times it comes up in the sample, divide this frequency by sample size). 2. Describe the variable. 3. Describe the confidence level you are taking and its specific meaning. 4. Show the confidence interval formula that you are using. 5. Show the reliability coefficient (critical value). 6. Show all the pertinent computations using the equation editor. 7. Draw a conclusion in the context of the experiment