Mathematics, 30.07.2019 20:30, xyzendre
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. also assume that the population standard deviations are equal (sigma 1equalssigma 2), so that the standard error of the difference between means is obtained by pooling the sample variances. a paint manufacturer wanted to compare the drying times of two different types of paint. independent simple random samples of 11 cans of type a and 9 cans of type b were selected and applied to similar surfaces. the drying times, in hours, were recorded. the summary statistics are as follows. type a type b x 1equals71.5 hr x 2equals68.5 hr s 1equals3.4 hr s 2equals3.6 hr n 1equals11 n 2equals9 construct a 99% confidence interval for mu 1minusmu 2, the difference between the mean drying time for paint type a and the mean drying time for paint type b.
Answers: 2
Mathematics, 21.06.2019 14:00, ctyrector
Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills
Answers: 2
Mathematics, 21.06.2019 20:00, Clervoyantyvonne
Simplify (2^5/3^2)^4 a. 2^20/3^8 b. 2^9/3^8 c. 8^5/12^2 d. 2/3^2
Answers: 1
Mathematics, 21.06.2019 23:00, Pingkay7111
Which geometric principle is used to justify the construction below?
Answers: 1
Construct the indicated confidence interval for the difference between the two population means. ass...
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