Tungsten content of the mined mineral. further mining of, Ask an Expert

Statistics

Samples of ores from the face of a drift on twenty consecutive days and assayed for tungsten (W). The twenty assays average 1.50% W, with a variance of 0.1% W2. Calculate a 90% confidence interval for the tungsten content of the mined mineral. Further mining of the drift would be justified if the grade is above 1.25% W; can we be 95% confident that this is the case?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9414255

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Find the probability and explain the results pleasethe

Find the probability and explain the results please. The population mean annual salary for environmental compliance specialists is about ?$60,500. A random sample of 33 specialists is drawn from this population. What is ...

Question 1private capital expenditure for 12 successive

Question 1 Private capital expenditure for 12 successive quarters are presented in the following table: Quarter Millions 1 31,920 2 25,120 3 30,350 4 24,650 5 30,090 6 23,980 7 28,450 8 26,710 9 31,380 10 27,260 11 3 ...

A binomial process has 892 trails and a probability of

A binomial process has 892 trails and a probability of success of 0.78. What is the standard deviation of this process distribution?

Consider the following difference equation and initial

Consider the following difference equation and initial condition(s). In each case, verify that the expression given for an (i) is a solution of the equation (ii) satisfies the initial condition(s). (a) an = 2(1/3)n satis ...

Since this in an empirical question that means that 68 is

Since this in an empirical question that means that 68% is in the middle and on the outer sides are the difference? The median life span of a mouse is 118 weeks Would you expect the life-span to be normally distributed? ...

Question 1co6 from a random sample of 68 businesses it is

Question 1 (CO6) From a random sample of 68 businesses, it is found that the mean time that employees spend on personal issues each week is 4.9 hours with a standard deviation of 0.35 hours. What is the 95% confidence in ...

A one bond has a coupon rate of 8 percent another a coupon

a) One bond has a coupon rate of 8 percent, another a coupon rate of 12 percent. Both bonds pay coupons annually, have 10-year maturities, and sell at a yield to maturity of 10 percent. If their yields to maturity next y ...

You have a bag with three fair dice one is 4-sided one is

You have a bag with three fair dice. One is 4-sided, one is 6-sided, and one is 12-sided. You reach into the bag, pick one die at random, and roll it. The outcome of the roll is 4. What is the probability that you rolled ...

How many years and months will it take 2 million to grow to

How many years (and months) will it take $2 million to grow to $5.60 million with an annual interest rate of 7 percent?

What considerations do you need to take when considering

What considerations do you need to take when considering "time value of money"? Why is the following statement true? "A dollar today is worth more than a dollar tomorrow."

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