Find a 95% confidence interval

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Question 1: On the Navajo Reservation, a random sample of 220 permanent dwellings in the tort Defiance region showed that 50 were traditional Navajo hogans. In the Indian Wells region, a random sample of 151 permanent dwellings showed that 19 were traditional hogans. let p, be the population proportion of all traditional hogarvs in the Fort Defiance region, and I4.1 p2 be the population proportion of all traditional hogans in the Indian Wells region.

(a) Find a 95% confidence interval for p1 - p2. (Use 3 decimal places.)
lower limit
upper limit

Question 2:
A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let xi be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x2 be the empathy score of a father. A random sample of 38 mothers gave a sample mean of 69.21. Another random sample of 3.) fathers gave x2 60,19. Assume that al - 11.69 and 02 - 11).57.

(*Let p: be the population mean of x: and let μ2 be the population mean of x2. Find a 95% confidence interval for μ1 - μ2. (Use 2 decimal places.)

Reference no: EM132610722

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