Question good wood a lab supply company sells pieces of, Ask an Expert

Statistics

Question: Good wood? A lab supply company sells pieces of Douglas fir 4 inches long and 1.5 inches square for force experiments in science classes. From experience, the strength of these pieces of wood follows a Normal distribution with standard deviation 3000 pounds. You want to estimate the mean load needed to pull apart these pieces of wood to within 1000 pounds with 95% confidence. How large a sample is needed? Show your work.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92575558

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Please help me study for a test by answering this

Please help me study for a test by answering this question. A stock is just paid a dividend of $0.91 and is growing at a constant rate of 10 percent per year. If the required rate of return is 15 percent, what is the sto ...

Question 1 assume you have noted the following prices for

Question: 1. Assume you have noted the following prices for paperback books and the number of pages that each book contains. Develop a least-squares estimated regression line. i. Compute the coefficient of determination ...

Research research and sample 5000 household concerning tv

Research research and Sample 5000 household concerning TV shows they watch. Based on the sample 18% reported watching 60 Minutes. What is the 95% confidence interval for the proportion of all Americans that watch 60 minu ...

In a class there are 7 girls and 5 boys the median age of

In a class there are 7 girls and 5 boys. The median age of the 7 girls is 12 and the median age of the 5 boys is 14. Additionally, you know that there are 3 girls with age greater than 14 and 2 boys with age less than 12 ...

The following frequency table summarizes the distances in

The following frequency table summarizes the distances in miles of 100 patients from a regional hospital. Distance Frequency 0-2 30 2-4 35 4-6 20 6-8 10 8-10 5 Calculate the sample variance and standard deviation for thi ...

Please show all worka pair of dice is tossed and the face

Please show all work. A pair of dice is tossed and the face number of each die is recorded. Assuming the dice are fair, what's the probability of the sum of the die faces showing is even?

If a study was done to measure the total brain volume of

If a study was done to measure the total brain volume of patients that had schizophrenia and also of patients that are normal. Table 1 has the total brain volume of the normal patients and table 2 has the total brain vol ...

What is the theory behind callable bonds and when are they

What is the theory behind callable bonds and when are they most likely to be called?

Parents who did not finish high school have sat math scores

Parents who did not finish high school have SAT math scores X with mean 451 and standard deviation 103. Scores Y of children of parents with graduate degrees have mean 567 and standard deviation 104. Perhaps we should st ...

A confidence interval estimate is desired for the gain in a

A confidence interval estimate is desired for the gain in a circuit on a semiconductor device. Assume that gain is normally distributed with standard deviation σ = 30. (a) How large must n be if the length of the 95% CI ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert