Question

The diameter of small bolts manufactured at a factory in China is expected to be approximately...

The diameter of small bolts manufactured at a factory in China is expected to be approximately
normally distributed with a population mean of 3 inches and a population standard deviation of .3
inches. Calculate a confidence interval which would contain 95% of all possible sample means.
Suppose the mean of the sample of 30 bolts is 3.75 inches. Using the interval that you calculated in
“A”, what would you conclude regarding this sample of bolts?

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
The diameter of small bolts manufactured at a factory in China is expected to be approximately...
The diameter of small bolts manufactured at a factory in China is expected to be approximately normally distributed with a population mean of 3 inches and a population standard deviation of .3 inches. Calculate a confidence interval which would contain 95% of all possible sample means. Suppose the mean of the sample of 30 bolts is 3.75 inches. Using the interval that you calculated in “A”, what would you conclude regarding this sample of bolts?
The diameter of small Nerf balls manufactured at a factory in China is expected to be...
The diameter of small Nerf balls manufactured at a factory in China is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inches. Suppose a random sample of 20 balls is selected. What percentage of sample means will be less than 5.14 inches? .048 22.66 4.8 .00048
The diameter of small Nerf bars manufactured overseas is expected to be approximately normally distributed with...
The diameter of small Nerf bars manufactured overseas is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inches. Suppose a random sample of 20 balls are selected. What percentage of sample means will be less than 5.14 inches? A. 0.043% B. 22.66% C. 4.3% D. 0.00043%
Question #3: In a manufacturing process, a random sample of 9 manufactured bolts has a mean...
Question #3: In a manufacturing process, a random sample of 9 manufactured bolts has a mean length of 3 inches with a variance of .09 and is normally distributed. What is the 90% confidence interval for the true mean length of the manufactured bolt?   Interpret your result.    b. How many manufactured bolts should be sampled in order to make us 90% confident that the sample mean bolt length is within .02 inches of the true mean bolt length?      
The diameter of a brand of tennis balls is approximately normally​ distributed, with a mean of...
The diameter of a brand of tennis balls is approximately normally​ distributed, with a mean of 2.55 inches and a standard deviation of 0.06 inch. A random sample of 12 tennis balls is selected. Complete parts​ (a) through​ (d) below. a. What is the sampling distribution of the​ mean? A. Because the population diameter of tennis balls is approximately normally​ distributed, the sampling distribution of samples of size 12 will be the uniform distribution. B. Because the population diameter of...
1) A machine is designed to produce bolts with a 3-in diameter. The actual diameter of...
1) A machine is designed to produce bolts with a 3-in diameter. The actual diameter of the bolts has a normal distribution with mean of 3.002 in and standard deviation of 0.002 in. Each bolt is measured and accepted if the length is within 0.005 in of 3 in; otherwise the bolt is scrapped. Find the percentage of bolts that are scrapped. 6.68% 93.32% 3.34% 50% 2) A random variable X is normally distributed with a mean of 100. If...
The diameter of a brand of tennis balls is approximately normally​ distributed, with a mean of...
The diameter of a brand of tennis balls is approximately normally​ distributed, with a mean of 2.57 inches and a standard deviation of 0.05 inch. A random sample of 10 tennis balls is selected. What is the probability that the sample mean is less than 2.56 inches?= 0.2643 What is the probability that the sample mean is between 2.55 and 2.58 inches?= 0.6319 The probability is 65% that the sample mean will be between what two values symmetrically distributed around...
The diameter of a brand of tennis balls is approximately normally distributed, with a mean of...
The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.73 inches and a standard deviation of 0.03 inch. A random sample of 12 tennis balls is selected. Complete parts (a) through (d) below What is the probability that the sample mean is between 2.72 and 2.74 inches? The probability is 71​% that the sample mean will be between what two values symmetrically distributed around the population​ mean?
The diameter of a brand of tennis balls is approximately normally distributed, with a mean of...
The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.51 inches and a standard deviation of 0.03 inch. A random sample of 11 tennis balls is selected. a. What is the probability that the sample mean is less than 2.49 inches? P(X < 2.49)=.0136 b. What is the probability that the sample mean is between 2.50 and 2.52 ?inches? P(2.50 < X < 2.52) d. The probability is 57 % that the sample...
The diameter of a brand of tennis balls is approximately normally​ distributed, with a mean of...
The diameter of a brand of tennis balls is approximately normally​ distributed, with a mean of 2.75 inches and a standard deviation of 0.04 inch. A random sample of 10 tennis balls is selected. What is the probability that the sample mean is less than 2.74 ​inches?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT