3. At Community Hospital, the burn center is experimenting with a new plasma compress treatment. A random sample of n,=316 patients with minor burns received the plasma compress treatment. Of these patients, it was found that 259had no visible scars after treatment. Another random sample of n,-419 patients with minor burns received no plasma compress treatment. For this group, it was found that 94 had no visible scars after treatment. Let p, be the population proportion of all patients with minor burns receiving-the plasma compress treatment who have no visible scars. Let P2 be the population proportion of all patients with minor burns not receiving the plasma compress treatment who have no visible scars. Find a 95% confidence interval for p,- P2 and explain the meaning of it.

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