Problem

Assume that military aircraft use ejection seats designed for men weighing between 147.3lb and 214lb. If women's weights are normally distributed with a mean of 161.8lb and a standard deviation of 43.4lb, what percentage of women have weights that are within those limits? Are many women excluded with those specifications?
The percentage of women that have weights between those limits is %. (Round to two decimal places as needed.)

Answer

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Answer

The percentage of women that have weights between those limits is 51.63%.

Steps

Step 1 :We are given that women's weights are normally distributed with a mean of 161.8lb and a standard deviation of 43.4lb.

Step 2 :We are asked to find the percentage of women whose weights fall within the range of 147.3lb to 214lb.

Step 3 :To solve this, we can standardize the weights using the z-score formula: z=Xμσ, where X is the value we are standardizing, μ is the mean, and σ is the standard deviation.

Step 4 :We calculate two z-scores: one for the lower limit (147.3lb) and one for the upper limit (214lb).

Step 5 :The z-score for the lower limit is 0.334 and for the upper limit is 1.203.

Step 6 :We then find the probabilities corresponding to these z-scores using the standard normal distribution. The probability for the lower limit is 0.369 and for the upper limit is 0.885.

Step 7 :The difference between these probabilities gives us the percentage of women whose weights fall within the given range.

Step 8 :The percentage of women that have weights between those limits is 51.63%.

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