Question

In: Statistics and Probability

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
  1. What is the point estimate of the difference between the two population means? (to 1 decimal)
  2. Provide a 90% confidence interval for the difference between the two population means (to 2 decimals).
  3. Provide a 95% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. If your answer is negative, enter minus (-) sign.

Solutions

Expert Solution



Related Solutions

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 = 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...
Consider the following results for independent random samples taken from two populations.   Sample 1 Sample 2...
Consider the following results for independent random samples taken from two populations.   Sample 1 Sample 2 n1= 10 n2 =  40 x1= 22.3 x2= 20.3 s1= 2.5 s2 = 4.1 a. What is the point estimate of the difference between the two population means (to 1 decimal)?      b. What is the degrees of freedom for the  t distribution (round down)?      c. At 95% confidence, what is the margin of error (to 1 decimal)?      d. What is the 95% confidence...
Consider the following results for two independent random samples taken from two populations. Sample 1: n1...
Consider the following results for two independent random samples taken from two populations. Sample 1: n1 = 40 x̅1 = 13.9 σ1 = 2.3 Sample 2: n2 = 30 x̅2 = 11.1 σ2 = 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 difference between the two population means...
Consider the following results for two independent random samples taken from two populations. Sample 1: n1...
Consider the following results for two independent random samples taken from two populations. Sample 1: n1 = 40 x̅1 = 13.9 σ1 = 2.3 Sample 2: n2 = 30 x̅2 = 11.1 σ2 = 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 difference between the two population means...
The following results are for independent random samples taken from two populations. Sample 1 Sample 2...
The following results are for independent random samples taken from two populations. Sample 1 Sample 2 n1 = 20 n2 = 30 x1 = 22.8 x2 = 20.1 s1 = 2.3 s2 = 4.8 (a) What is the point estimate of the difference between the two population means? (Use x1 − x2.) (b) What is the degrees of freedom for the t distribution? (Round your answer down to the nearest integer.) (c) At 95% confidence, what is the margin of...
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)...
1. Consider the following results for independent samples taken from two populations. Sample 1 Sample 2...
1. Consider the following results for independent samples taken from two populations. Sample 1 Sample 2 n1 = 500 n2= 200 p1= 0.45 p2= 0.34 a. What is the point estimate of the difference between the two population proportions (to 2 decimals)? b. Develop a 90% confidence interval for the difference between the two population proportions (to 4 decimals). Use z-table. to c. Develop a 95% confidence interval for the difference between the two population proportions (to 4 decimals). Use...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT