from above 99% CI =-30.7 ; 1.5
Construct the indicated confidence interval for the difference between the two population means. Assume that the...
Assume that the assumptions and conditions for inference with a two-sample t-test are met. Test the indicated claim about the means of the two populations. State your conclusion.A researcher wishes to determine whether people with high blood pressure can reduce their blood pressure by following a particular diet. Use the sample data below to test the claim that the treatment population mean μ1 is smaller than the control population mean μ2. Test the claim using a significance level of 0.01. Treatment...
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 (12) so that the standard error of the difference between means is obtained by pooling the sample variances. A researcher regularly and people who do not exercise regularly, Independent simple random samples were obtained of 16 people who do not exercise regularly and...
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. A paint manufacturer wished 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...
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. x1 = 958, x2 = 157, s1 = 77, s2 = 88. The sample size is 478 for both samples. Find the 85% confidence interval for ?1 - ?2.
Can someone explain how to find the answer? 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 μ1-μ2 X1-958, x2-157, s1 77, s2-88 ○ A. 791 <...
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 (0, 0), 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...
Test the indicated claim about the means of two populations. Assume that the two samples are independent an have been randomly selected. 3) Two types of flares are tested for their burning times (in minutes) and sample results are 3). given below. Brand X Brand Y n=35 n = 40 x = 19.4 x = 15.1 s = 1.4 s 0.8 Refer to the sample data to test the claim that the two populations have equal means. Use a 0.05...
11. Construct the indicated confidence interval for the difference between population proportions. Assume that the samples are independent and that they have been randomly selected. A marketing survey involves product recognition in New York and California. Of 558 New Yorkers surveyed, 193 knew the product while 196 out of 614 Californians knew the product. Construct a 99% confidence interval for the difference between the two population proportions. 12. Construct the indicated confidence interval for the difference between population proportions. Assume...
The confidence interval for the difference in population means, μ1 - μ2 is based on the same approach used in the case of one sample: Point Estimate ± Standard Error. Group of answer choices True False
4. A researcher wishes to determine whether people with high blood pressure can reduce their blood pressure by following a particular diet. The sample data is shown below, where Hs represents the mean blood pressure of the treatment group and u, represents the mean for the control group significance level of 0.01 and whichever method you deem appropriate (p-value method, critical value . Use a method, or confidence interval method) to test the claim that the diet reduces the blood...