## Solution Library

#### Estimating the Size of a Sample to Study Average Sick Days Taken by Workers

QuestionAn insurance company is trying to estimate the average number of sick days that full-time food service workers use per year. A pilot study found the standard deviation to be 2.5 days. How large a sample must be selected if the company wants to be 95% confident of getting an interval that con ... Read More

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#### Estimating the Size of a Sample to Study Youngsters Driving Under Drugs or Alcohol

QuestionA survey in Australia found that 21% of all Americans aged 16 to 20 drove under the influence of drugs or alcohol. A similar survey is planned for New Zealand. How large a sample is required if they want a 95% confidence interval to be accurate within 3.5%?SummaryThe question belongs to Stat ... Read More

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#### Study on New Drug Which Increases White Blood Cell Count in Chemotherapy Patients

QuestionBarterol is a drug designed to increase the white blood cell count for patients receiving chemotherapy. When subjects were tested with this drug, their white cell count reading (in thousands per ml) was recorded before and after the drug was taken. The results are shown in the following tabl ... Read More

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#### Study on New Drug Increasing White Blood Cell Count for Patients on Chemotherapy

Barterol is a drug designed to increase the white blood cell count for patients receiving chemotherapy. When subjects were tested with this drug, their white cell count reading (in thousands per ml) was recorded before and after the drug was taken. The results are shown in the following table. White ... Read More

 Price: Original Price: \$6.50 Now at: \$3.50

#### Study on New Drug for Decreasing Insulin Level in Patients

QuestionThe average insulin level in a certain group of patients is 240 ml. A new medication is designed to lower the level in this population after one month. A sample of 60 people in the population used the medication for 30 days, after which their average insulin level was 232 milligrams with a s ... Read More

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#### Study on New Drug for Insulin Decrease Needs to be Tested

QuestionThe average insulin level in a certain group of patients is 240 ml. A new medication is designed to lower the level in this population after one month. A sample of 60 people in the population used the medication for 30 days, after which their average insulin level was 232 milligrams with a s ... Read More

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#### Difference Between Qualitative and Quantitative Research

QuestionCompare qualitative and quantitative research. What different data or information do these approaches supply to researchers? What are the strengths and weaknesses of both of these sources of data? Using an example, illustrate how qualitative and quantitative methods can be used to study the ... Read More

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#### Ways of Reducing Gender Bias in Sampling

QuestionYou want to conduct a survey of social work students here at the University. You have determined that a random sample is best and have been provided with a list of all students’ names. Given that there are less male than female students, you are concerned that a simple random sample wo ... Read More

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#### Difference Between Formative and Summative Research Methods

QuestionA researcher is contemplating undertaking research in partnership with a local child welfare agency. Describe the ways in which the researcher would conduct a formative and then a summative research design. How would the results of each design be used to improve the quality of the program be ... Read More

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#### Define Conceptualization And Operationalization With An Example

QuestionDefine conceptualization and operationalization. Describe a variable and provide an example of its conceptual and operational definition. SummaryThe question belongs to Statistics and it is discuses about conceptualization and operationalization. These two concepts are explained using a vari ... Read More

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#### Find the Difference Between Samples with Same or Equal Mean

QuestionA researcher has collected two different samples. Both samples of 20 individuals have a mean of 10. However, one sample has a standard deviation of 2 and the other has a standard deviation of 8. Please describe the differences between the two samples. SummaryThe question belongs to Statistic ... Read More