Question

In: Statistics and Probability

Following are two computer-generated random samples of size n=12 from normal populations: sample 1: 31.7, 30.3,...

Following are two computer-generated random samples of size n=12 from normal populations:

sample 1: 31.7, 30.3, 29.3, 30.1, 29.2, 31.5,
28.9, 31.1, 27.6, 29.3, 32.0, 30.9

Sample 2: 29.4, 29.7, 26.7, 28.0, 30.8, 29.8,
28.3, 28.6, 28.2, 29.4, 31.2, 29.8

Use the two-sample t test to test the null hypothesis μ1=μ2 against the alternative hypothesis μ1≠μ2 at the 0.10 level of significance. State assumptions.

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

Consider the following data for two independent random samples taken from two normal populations. Sample 1...
Consider the following data for two independent random samples taken from two normal populations. Sample 1 11 6 13 7 9 8 Sample 2 8 7 9 4 5 9 (a) Compute the two sample means. Sample 1Sample 2 (b) Compute the two sample standard deviations. (Round your answers to two decimal places.) Sample 1Sample 2 (c) What is the point estimate of the difference between the two population means? (Use Sample 1 − Sample 2.) (d) What is the...
3. The following results come from two independent random samples taken from two populations. Sample Size...
3. The following results come from two independent random samples taken from two populations. Sample Size Sample Mean Population Standard Deviation Sample 1 n1=52 x1=15.4 σ1=3.1 Sample 2 n2=64 x2=17.3 σ2=4.2 Provide a 95% confidence interval for the difference between two population means. Using the critical value approach, test whether the population means differ at the 5% significance level. Using the p-value approach, test whether the population means differ at the 5% significance level.
independent random samples selected from two normal populations produced the following sample means and standard deviations....
independent random samples selected from two normal populations produced the following sample means and standard deviations. sample 1: n1= 17, x1= 5.4, s1= 3.4 sample 2: n2 =12, x2 = 7.9, s2= 4.8 a. assuming equal variances, conduct the test ho: (m1-m2) is equal to 0, against the ha: (m1-m2) isn't equal to 0 using alpha = .05 b. find and interpret the 95% confidence interval (m1-m2).
Independent random samples selected from two normal populations produced the following sample means and standard deviations....
Independent random samples selected from two normal populations produced the following sample means and standard deviations. Sample 1 Sample 2 n1 = 14 n2 = 11 1 = 7.1 2 = 8.4 s1 = 2.3 s2 = 2.9 Find and interpret the 95% confidence interval for   
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n1 = 50 n2 = 30 x1 = 13.4 x2 = 11.7 σ1 = 2.3 σ2 = 3 What is the point estimate of the difference between the two population means? Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). ( , ) Provide a 95% confidence interval for the difference between the two population means...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n 1 = 50 n 2 = 35 x 1 = 13.1 x 2 = 11.5 σ 1 = 2.4 σ 2 = 3.2 What is the point estimate of the difference between the two population means? (to 1 decimal) Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. ( ,  ) Provide a 95%...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n 1 = 50 n 2 = 35 x 1 = 13.6 x 2 = 11.1 σ 1 = 2.4 σ 2 = 3.4 What is the point estimate of the difference between the two population means? (to 1 decimal) Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). Provide a 95% confidence interval for the...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n 1 = 40 n 2 = 30 x 1 = 13.1 x 2 = 11.1 σ 1 = 2.3 σ 2 = 3.4 What is the point estimate of the difference between the two population means? (to 1 decimal) Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. ( ,  ) Provide a 95%...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n 1 = 50 n 2 = 30 x 1 = 13.8 x 2 = 11.5 σ 1 = 2.4 σ 2 = 3.4 What is the point estimate of the difference between the two population means? (to 1 decimal) Provide a 90% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. ( , ) Provide a...
The following results come from two independent random samples taken of two populations. Sample 1 Sample...
The following results come from two independent random samples taken of two populations. Sample 1 Sample 2 n1 = 60 n2 = 35 x1 = 13.6 x2 = 11.6 σ1 = 2.5 σ2 = 3 (a) What is the point estimate of the difference between the two population means? (Use x1 − x2.) (b) Provide a 90% confidence interval for the difference between the two population means. (Use x1 − x2. Round your answers to two decimal places.)   to   (c)...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT