Solve the problem. 9) A simple random sample of women aged 18–24 is selected, and the systolic blood pressure of each woman is measured. The results (in mmHg) are as follows: x = 122.1, s = 14.4. The sample size is less than 20. A 99% confidence interval for the population mean is found to be u = 122.1 ± 10.20. 9) Find the sample size,

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