Question

A researcher analyzed large independent samples for two groups with n_A = n_B = 1450. The...

A researcher analyzed large independent samples for two groups with n_A = n_B = 1450. The 99% CI of group A mean is [127.36, 128.75]. The 99% CI of group B mean is [105.67, 107.43]. What is the margin of error for the 99% CI of the *difference* between the population means of the two groups. (Record your answer accurate to at least the nearest second decimal place with standard rounding.)

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use...
1. A researcher is comparing scores from two treatment groups using independent samples t test. Use a Hartley’s F-max test to examine this assumption (each group has 6 participants, s2 in group 1 is 20, and s2 in group 2 is 15, set alpha level at .05). Also, how should this researcher estimate the standard error in the independent samples t test?
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 = 2.6 s2 = 4.6 (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...
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 = 22.5 x2 = 20.1 s1 = 2.2 s2 = 4.6 (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...
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 = 22.5 x2 = 20.1 s1 = 2.9 s2 = 4.6 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...
For a 99.9% confidence interval estimate of the difference in two proportions, what value must you...
For a 99.9% confidence interval estimate of the difference in two proportions, what value must you multiply the standard error by to obtain the margin of error? (Record your answer accurate to the nearest FOURTH decimal place with standard rounding.)
The elasticity values of two independent different types of products are analyzed. Elasticity of product I...
The elasticity values of two independent different types of products are analyzed. Elasticity of product I has mu_1= 121 and sigma_1= 20 whereas elasticity of product II has mu_2= 132 and sigma_2= 12. Random samples of n_1=25 products and n_2=36 products are selected What is the standard error of the difference of the two sample means??
A researcher wishes to assess how much the inclusion of a refrigerator magnet affects the response...
A researcher wishes to assess how much the inclusion of a refrigerator magnet affects the response rate to direct mail for a local real estate agency. Of the 1058 mailings with a magnet, 15 homeowners contacted the agency. Of the 2600 mailings without a magnet, 25 homeowners contacted the agency. For a 95% confidence level, what is the MARGIN OF ERROR (ME) for the difference in the response rates? (Answer as a rate, not a percent. Record your answer accurate...
1. if a statistically significant difference was found between two means using an independent-samples t test,...
1. if a statistically significant difference was found between two means using an independent-samples t test, which of the following interpretations would be correct. A) something over and above sampling error is responsible for the difference between sample means B) the difference between two means is meaningful. C)it is unlikely that something other than error is responsible for the difference between the sample means. D) the difference between the two means is due to a large effect size 2. in...
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 = 40 n2 = 50 x1 = 32.2 x2 = 30.1 s1 = 2.6 s2 = 4.3 (a) What is the point estimate of the difference between the two population means? (b) What is the degrees of freedom for the t distribution? (c) At 95% confidence, what is the margin of error? (d) What is the 95% confidence interval for the difference between...
Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations...
Independent random samples were selected from two quantitative populations, with sample sizes, means, and standard deviations given below. n1 = n2 = 80, x1 = 125.3, x2 = 123.6, s1 = 5.7, s2 = 6.7 Construct a 95% confidence interval for the difference in the population means (μ1 − μ2). (Round your answers to two decimal places.) Find a point estimate for the difference in the population means. Calculate the margin of error. (Round your answer to two decimal places.)