Question

The diameter of steel rods manufactured on two different extrusion machines is being investigated. Two random...

The diameter of steel rods manufactured on two different extrusion machines is being investigated. Two random samples of size n1 = 15 and n2 = 23 are selected, and the sample means and sample variances are X1 = 9, sample variance 1 = 0.9, X2 = 8, sample variance 2 = 1.3, respectively. Assume variance1=variance2 and that the data are drawn from a normal distribution.In order to test the hypothesis calculate t0

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

For further queries, please comment below.

Thank you.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The diameter of steel rods manufactured on two different extrusion machines is being investigated. Two random...
The diameter of steel rods manufactured on two different extrusion machines is being investigated. Two random samples of sizes ?1 = 20 and ?2 = 24 are selected, and the sample means and sample variances are ?̅̅1̅ = 9.22, ?1 = 0.55, ?̅̅2̅ = 9.43, and ?2 = 0.62, respectively. Assume that ?1 2 = ?2 2 and that the data are drawn from a normal distribution. Is there evidence to support the claim that the two machines produce rods...
The diameter of steel rods manufactured on two different extrusion machines is being investigated. Two random...
The diameter of steel rods manufactured on two different extrusion machines is being investigated. Two random samples of sizes ?1 = 15 and ?2 = 17 are selected, and the sample means and sample variances are ?̅1 = 8.73, ?2 = 0.35, ?̅ = 8.68, and ?2 = 0.40, respectively. a.Write down null and alternative hypotheses to test if the machines produce rods with different mean diameters. b.What is the type of statistical test that is appropriate? Explain. c.Test the...
Exercise 2. The following information is based on independent random samples taken from two normally distributed...
Exercise 2. The following information is based on independent random samples taken from two normally distributed populations having equal variances: Sample 1 Sample 2 n1= 15 n2= 13 x1= 50 x2= 53 s1= 5 s2= 6 Based on the sample information, determine the 90% confidence interval estimate for the difference between the two population means.
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 = 2.3 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)...
Confidence Interval for 2-Means (2 Sample T-Interval) Given two independent random samples with the following results:...
Confidence Interval for 2-Means (2 Sample T-Interval) Given two independent random samples with the following results: n1=11 n2=17 x1¯=118 x2¯=155 s1=18 s2=13 Use this data to find the 99% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Round values to 2 decimal places. Lower and Upper endpoint?
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...
{Exercise 10.01 Algorithmic} Consider the following results for two independent random samples taken from two populations....
{Exercise 10.01 Algorithmic} Consider the following results for two independent random samples taken from two populations. Sample 1 Sample 2 n1 = 50 n2 = 30 x1 = 13.1 x2 = 11.2 σ1 = 2.1 σ2 = 3.2 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...
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...
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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT