Question

A manufacturer of machine rods (normally distributed diameters) tests a sample of 41 rods and finds...

A manufacturer of machine rods (normally distributed diameters) tests a sample of 41 rods and finds that they have an average diameter of 13.532 mm and a sample standard deviation of 5 mm. Does the data support the supervisor's claim that the production line is producing rods that are at or larger than the target of 13.4 mm diameter? Use a 5% level of significance.

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
Question 1​(2 marks) A company manufactures rods whose diameters are normally distributed with a mean of...
Question 1​ A company manufactures rods whose diameters are normally distributed with a mean of 8 mm and standard deviation of 0.04 mm. It also drills holes to receive the rods and the diameters of these are normally distributed with a mean of 8.1 mm and a standard deviation of 0.06 mm. The rods are allocated to the holes at random. What proportion of rods will not fit into the holes?
The diameters of bolts produced in a machine shop are normally distributed with a mean of...
The diameters of bolts produced in a machine shop are normally distributed with a mean of 5.72 millimeters and a standard deviation of 0.07 millimeters. Find the two diameters that separate the top 5% and the bottom 5% . These diameters could serve as limits used to identify which bolts should be rejected. Round your answer to the nearest hundredth, if necessary.
A rods manufacturer makes rods with a length that is supposed to be 14 inches. A...
A rods manufacturer makes rods with a length that is supposed to be 14 inches. A quality control technician sampled 33 rods and found that the sample mean length was 14.05 inches and the sample standard deviation was 0.27 inches. The technician claims that the mean rod length is more than 14 inches. What type of hypothesis test should be performed? What is the test statistic? What is the number of degrees of freedom? Does sufficient evidence exist at the...
A bolt manufacturer is trying to calibrate a new machine that is to produce 0.23cm0.23⁢cm bolts....
A bolt manufacturer is trying to calibrate a new machine that is to produce 0.23cm0.23⁢cm bolts. The manufacturer takes a random sample of 2929 bolts produced by the new machine and finds that the standard deviation is 0.13350.1335. If the machine is operating properly, the variance of the diameters of the bolts should be 0.0150.015. Does the manufacturer have evidence at the α=0.01α=0.01 level that the variance of the bolt diameters is more than required? Assume the population is normally...
A battery manufacturer finds that the life of its batteries are normally distributed with a mean...
A battery manufacturer finds that the life of its batteries are normally distributed with a mean of 32 months and a standard deviation of 5 months. Find the probability that a battery lasts more than 36 months. Round off to four decimal places.
A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.18...
A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.18 centimeters. If the variance of the diameters is equal to 0.015, then the machine is working as expected. A random sample of 26 bolts has a standard deviation of 0.1806. Does the manufacturer have evidence at the α=0.1 level that the variance of the bolt diameters is more than required? Assume the population is normally distributed. Step 1 of 5: State the null and...
A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.23...
A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.23 centimeters. If the variance of the diameters is equal to 0.025. then the machine is working as expected. A random sample of 26 bolts has a standard deviation of 0.2318. Does the manufacturer have evidence at the α=0.1 level that the variance of the bolt diameters is more than required? Assume the population is normally distributed Step 1 of 5: State the null and...
A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.28...
A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.28 centimeters. If the variance of the diameters is equal to 0.03, then the machine is working as expected. A random sample of 14 bolts has a standard deviation of 0.1741. Does the manufacturer have evidence at the α=0.01 level that the variance of the bolt diameters is more than required? Assume the population is normally distributed. Step 1 of 5: State the null and...
The diameters of a random sample of 20 products made by a certain machine during one...
The diameters of a random sample of 20 products made by a certain machine during one month showed a mean of 0.93 inch and a sample standard deviation of 0.05 inch. Assume the population is normally distributed, find a 95% confidence intervals for the mean diameter of all the products. Select one: a. 0.9107 to 0.9493 inch b. 0.9066 to 0.9534 inch c. 0.9081 to 0.9519 inch d. 0.9248 to 0.9352 inch
A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly...
A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 401 gram setting. It is believed that the machine is underfilling the bags. A 10 bag sample had a mean of 393 grams with a standard deviation of 10. Assume the population is normally distributed. Is there sufficient evidence at the 0.02 level that the bags are underfilled? ANSWER CHOICES: A) There is not sufficient evidence to support the claim that the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT