Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Independent samples from two different populations yield the following data. The sample size is 478 for both samples. Find the 85% confidence interval for - H2- x = 958, x2 = 157, s, = 77, s2 = 88 O A. 793

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Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random
samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Independent samples from two different
populations yield the following data. The sample size is 478 for both samples. Find the 85% confidence interval for u, - H2.
X1 = 958, X2 = 157, s̟ = 77, s2 = 88
A. 793<µ, - H2 < 809
B. 781 <H1 - H2 < 821
C. 800 <µ, - H2 < 802
O D. 791 <H1 - H2 < 811
Sc
Scree
Show
Transcribed Image Text:Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Independent samples from two different populations yield the following data. The sample size is 478 for both samples. Find the 85% confidence interval for u, - H2. X1 = 958, X2 = 157, s̟ = 77, s2 = 88 A. 793<µ, - H2 < 809 B. 781 <H1 - H2 < 821 C. 800 <µ, - H2 < 802 O D. 791 <H1 - H2 < 811 Sc Scree Show
Assume that the following confidence interval for the difference in the mean length of male (sample 1) and female babies (sample 2) at birth was constructed using
independent simple random samples. What does the confidence interval suggest about the difference in length between male babies and female babies?
- 0.2 in. < H1 - H2 <1.7 in.
A. Male babies are longer.
B. Female babies are longer.
C. There is no difference in the length between male and female babies.
Click to select your answer.
Transcribed Image Text:Assume that the following confidence interval for the difference in the mean length of male (sample 1) and female babies (sample 2) at birth was constructed using independent simple random samples. What does the confidence interval suggest about the difference in length between male babies and female babies? - 0.2 in. < H1 - H2 <1.7 in. A. Male babies are longer. B. Female babies are longer. C. There is no difference in the length between male and female babies. Click to select your answer.
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