THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A clinic offers a weight-reduction program.A review of its records revealed the following weight losses,in pounds,for a random sample of 10 of its clients at the conclusion of the program: 20,15,21,28,22,19,9,14,18,and 23.
-To calculate a required sample size to estimate a population proportion,given a desired confidence interval and margin of error,the sample proportion is required but often unknown before the sample is collected.How is this predicament resolved?

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The Answer of THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A clinic offers a weight-reduction program.A review of its records revealed the following weight losses,in pounds,for a random sample of 10 of its clients at the conclusion of the program: 20,15,21,28,22,19,9,14,18,and 23.
-To calculate a required sample size to estimate a population proportion,given a desired confidence interval and margin of error,the sample proportion is required but often unknown before the sample is collected.How is this predicament resolved?