To construct a 90% confidence interval for the mean pulse rate of adult females, we follow these steps:

Steps for Confidence Interval Calculation:

1. **Identify the sample dataTo construct a 90% confidence interval for the mean pulse rate of adult females, we follow these steps:

Steps for Confidence Interval Calculation:

1. **Identify the sample **

   • We need the sample mean ($\bar{x}$), sample standard deviation ($s$), and sample size ($n$) for adult females.

2. Determine the z-score (or t-score for small samples):

   • For a 90% confidence interval, the critical value $z_{\alpha/2}$ corresponds to the 5th percentile in a standard normal distribution, which is approximately 1.645 (since 90% confidence interval splits the remaining 10% into 5% in each tail).

3. Apply the formula: The confidence interval formula is given by: $\bar{x} \pm z_{\alpha/2} \left(\frac{s}{\sqrt{n}}\right)$ where:

   • $\bar{x}$ = sample mean
   • $s$ = sample standard deviation
   • $n$ = sample size
   • $z_{\alpha/2}$ = critical value from z-distribution for a 90% confidence