Question

Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent and that they have been randomly selected. Independent samples from two different populations yield the following data. x?1 = 528, x?2 = 490, s1 = 91, s2 = 94. The sample size is 121 for both samples. Find the 90 percent confidence interval for ?1 - ?2. 23 < ?1 - ?2 < 53 37 < ?1 - ?2 < 39 18 < ?1 - ?2 < 58 -2 < ?1 - ?2 < 78 None of these

          Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent and that they have been randomly selected.

Independent samples from two different populations yield the following data. x?1 = 528, x?2 = 490, s1 = 91, s2 = 94. The sample size is 121 for both samples. Find the 90 percent confidence interval for ?1 - ?2.

23 < ?1 - ?2 < 53
37 < ?1 - ?2 < 39
18 < ?1 - ?2 < 58
-2 < ?1 - ?2 < 78
None of these

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Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent and that they have been randomly selected.

Independent samples from two different populations yield the following data. x?1 = 528, x?2 = 490, s1 = 91, s2 = 94. The sample size is 121 for both samples. Find the 90 percent confidence interval for ?1 - ?2.

23 < ?1 - ?2 < 53
37 < ?1 - ?2 < 39
18 < ?1 - ?2 < 58
-2 < ?1 - ?2 < 78
None of these

Added by Logan G.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Lien Le

08/29/2023

Step 1

We are given two sample means and standard deviations, as well as the sample sizes. We can use this information to calculate the standard error of the difference between the means: SE = sqrt[(s1^2/n1) + (s2^2/n2)] SE = sqrt[(91^2/121) + (94^2/121)] SE = 14.67 Show more…

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Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent and that they have been randomly selected: Independent samples from two different populations yield the following data: x1 = 528, x2 = 490, s1 = 91, s2 = 94. The sample size is 121 for both samples. Find the 90 percent confidence interval for μ1 - μ2. 23 < μ1 - μ2 < 53 37 < μ1 - μ2 < 39 18 < μ1 - μ2 < 58 -2 < μ1 - μ2 < 78 None of these

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