Question

A study is done to determine if two machines produce good parts at the same rate....

A study is done to determine if two machines produce good parts at the same rate. A random sample of 150 parts are taken from the first machine and 125 are found to be good. A random sample of 350 parts are taken from the second machine and 330 are found to be good.

a) State the null and alternative hypothesis for this test

b) Use technology to conduct the hypothesis test with 99% confidence

c) State the decision of this test

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

Homework Answers

Answer #1

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
Two different types of injection-moulding machines are used to form plastic parts. A part is considered...
Two different types of injection-moulding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected, and 20 defective parts are found in the sample from machine 1, and 8 defective parts are found in the sample from machine 2. Construct a 99% lower bound on the difference in the two fractions (p1-p2).  Please report your answer to 3 decimals.
Two different types of injection-moulding machines are used to form plastic parts. A part is considered...
Two different types of injection-moulding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected, and 10 defective parts are found in the sample from machine 1, and 8 defective parts are found in the sample from machine 2. Construct a 99% lower bound on the difference in the two fractions (p1-p2). Please report your answer to 3 decimals.
Two different types of injection-moulding machines are used to form plastic parts. A part is considered...
Two different types of injection-moulding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected, and 12 defective parts are found in the sample from machine 1, and 8 defective parts are found in the sample from machine 2. Construct a 99% lower bound on the difference in the two fractions (p1-p2). Please report your answer to 3 decimals.
Two different types of injection-molding machines are used to form plastic bottle. A bottle is considered...
Two different types of injection-molding machines are used to form plastic bottle. A bottle is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected, and 15 defective parts are found in the sample from machine 1 while 8 defective parts are found in the sample from machine 2. (a) Is it reasonable to conclude that both machines produce the same fraction of defective parts? Use ?? = 0.05 [10 points]...
Two machines are used to fill 50-lb bags of dog food. Sample information for these two...
Two machines are used to fill 50-lb bags of dog food. Sample information for these two machines is given in the table.       If the computed test statistic is -9.00, what is the decision and conclusion?     FTR the null hypothesis, machine A fills less.      reject the null hypothesis, machine A fills more.     FTR the alternative hypothesis, machine A fills less.     FTR Ho, machine A does not fill less.     reject the null hypothesis, machine A fills less. If...
Two machines each produce batches of part Q7BC. A random sample of Q7BC parts from each...
Two machines each produce batches of part Q7BC. A random sample of Q7BC parts from each machine’s recent production produced the following frequency table. One Q7BC part is selected randomly. Frequencies Machine A Machine B Totals Defective (D) 5 2 7 Not Defective (N)   145 48 193 Totals 150 50 200 Express each desired probability using proper probability notation. Then find the probability using our probability framework. Show your work. Find the probability that the part was produced by machine...
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...
Two different types of injection-molding machines are used to form plastic parts. A part is considered...
Two different types of injection-molding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected, and 18 defective parts are found in the sample from machine 1, and 6 defective parts are found in the sample from machine 2. a) Construct a 95% confidence interval on the difference in fraction defectives. b) Discuss what practical conclusions you would draw in part
Two different types of injection-molding machines are used to form plastic parts. A part is considered...
Two different types of injection-molding machines are used to form plastic parts. A part is considered defective if it has excessive shrinkage or is discolored. Two random samples, each of size 300, are selected, and 15 defective parts are found in the sample from machine 1 while 12 defective parts are found in the sample from machine 2. Construct a 95% confidence interval on the difference in the two fractions defective ( p 1 – p 2) . Round your...
A bolt manufacturer is very concerned about the consistency with which his machines produce bolts. The...
A bolt manufacturer is very concerned about the consistency with which his machines produce bolts. The bolts should be 0.18 centimeters in diameter. The variance of the bolts should be 0.015. A random sample of 18 bolts has an average diameter of 0.19cm with a standard deviation of 0.0607. Can the manufacturer conclude that the bolts vary from the required variance at α=0.1 level? Step 1: State the null and alternative hypothesis Step 2: Determine the critical value(s) of the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT