8. Two independent random samples drawn from normal distributions have equal variances and means and p2....
8. Two independent random samples drawn from normal distributions have equal variances and means pli and M2. You are given • The sample mean from the first sample is 16.9. • The sample mean from the second sample is 22.1. • The number of observations from both samples combined is 17. • The upper bound of the 90% confidence interval for H1 - H2 is 1.44. Let tay be the critical value of a t random variable with v degrees...
Independent random samples were selected from two quantitative populations, with sample sizes, means, and variances given below. Population 1 2 Sample Size 39 44 Sample Mean 9.3 7.3 Sample Variance 8.5 14.82 Construct a 90% confidence interval for the difference in the population means. (Use μ1 − μ2. Round your answers to two decimal places.) __________ to ____________ Construct a 99% confidence interval for the difference in the population means. (Round your answers to two decimal places.) __________ to _____________
Consider the folloing data for two independent random samples taken from two normal populations with equal variances. find the 80% confidence interval for µ1 - µ2. sample 1: 12,8,11,6,13,7 sample 2: 13,16,10,9,13,14 what is the left endpoint and right endpoint?
Consider the following data for two independent random samples taken from two normal populations with equal variances. Find the 80% confidence interval for µ1 - µ2. sample 1: 11, 5, 12, 9, 6, 8 sample 2: 11, 9, 8, 13, 14, 11 what are the left and right endpoints?
Independent random samples selected from two normal populations produced the sample means and standard deviations shown to the right. a) Assuming equal variances, conduct the test Ho: (u1-u2)=0 against Ha: (u1-u2)=/=0 using a=0.05 b) Find and interpret the 95% confidence interval for (u1-u2) Sample1: n1=17, x1=5.9, s1=3.8 Sample2: n2=10, x1=7.3, s2=4.8
Consider the following data for two independent random samples taken from two normal populations with equal variances. Find the 80% confidence interval for u1 and u2. Sample 1: 7, 4, 10, 10, 6, 11 Sample 2: 13, 16, 10, 9, 13, 14 What is the left endpoint and right endpoint? Please explain in detail.
you select two independent random samples from populations with means u1 and u2. suppose the sample mean for population 1 is 25 and σ1=3 and the sample mean for population is 20 and σ2=4. the 95% confidence interval for u1-u2 is (4.02,5.98). what common sample size, n, was used to obtain this interval?
Two random samples are selected from two independent populations. A summary of the samples sizes, sample means, and sample standard deviations is given below: n1=51, n2=46, x¯1=57.8, x¯2=75.3, s1=5.2 s2=11 Find a 94.5% confidence interval for the difference μ1−μ2μ1−μ2 of the means, assuming equal population variances. Confidence Interval =
Independent random samples selected from two normal populations produced the sample means and standard deviations shown to the right. a. Assuming equal variances, conduct the test Ho ??-?2):0 against Ha : (??-?2)#0 using ?:010. b. Find and interpret the 90% confidence interval for ( 1- 2)- Sample 1 Sample 2 n1 18 n2 13 x1-5.2 x27.7 s1 3.7 s2 4.3 a. Find the test statistic. The test statistic is (Round to two decimal places as needed.)
Independent random samples selected from two normal populations produced the sample means and standard deviations shown to the right. a. Assuming equal variances, conduct the test Ho (H1-H2) = 0 against Hy: (H1-H2) #0 using a = 0.10. b. Find and interpret the 90% confidence interval for (H1-H2) Sample 1 Sample 2 ny - 18 ng - 11 X2 7.8 X = 5.6 Sy = 3.1 82 4.7 a. Find the test statistic, The test statistic is (Round to two...