Before bidding on a contract a contractor wants to be 90, Ask an Expert

Statistics

Before bidding on a contract, a contractor wants to be 90% confident that he is in error by less than 20 minutes in estimating the average time it takes a certain kind of cement to dry. If the standard deviation of the time it takes to dry can be assumed to be 75 minutes, on how large a sample should he base the estimate?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9998487

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

If a coin is tossed 5times and then a standard six-sided

If a coin is tossed 5times, and then a standard six-sided die is rolled 2 times, and finally a group of two cards are drawn from a standard deck of 52 cards without replacement, how many different outcomes are possible?

Can a business have too much money in cash meaning cash on

Can a business have too much money in Cash, meaning cash on hand as well as in checking and savings accounts? What if a business had 100 million dollars in these cash accounts but only needed half of that for what Keynes ...

A researcher reports that the size of an effect in

A researcher reports that the size of an effect in Population A is d = 0.10 and the effect size in Population B is d = 0.34. Which population is associated with greater power to detect an effect? A) Population A B) Popul ...

Ye observed the following returns over timeyear

You have observed the following returns over time: Year BMG Market 1990 18% 13% 1991 4% 8% 1992 -12% 3% 1993 16% 10% 1994 18% 11% What is the beta for BMG?

1i your company currently hasnbsp1000nbspparnbsp65

1 i. Your company currently has $1,000 ?par, 6.5 % coupon bonds with 10 years to maturity and a price of $1,082. If you want to issue new? 10-year coupon bonds at? par, what coupon rate do you need to? set? Assume that f ...

Suppose you sell a fixed asset for 121000 when its book

Suppose you sell a fixed asset for $121,000 when it's book value is $147,000. If your company's marginal tax rate is 35%, what will be the effect on cash flows of this sale (i.e., what will be the after-tax cash flow of ...

An independent-measures study has one sample with n 10 and

An independent-measures study has one sample with n = 10 and a second sample with n = 15 to compare two experimental treatments. What is the df value for the t statistic for this study?

A business analyst in the washington dc area looked at the

A business analyst in the Washington, D.C. area looked at the following Christmas 2016 and 2017 toy sales in Metro D.C. Six toy stores were were contacted and shared the following information where x is 2016 sales and y ...

Discrete probability variablesthirtynbsppercent of

Discrete probability variables. Thirty percent of households say they would feel secure if they had? $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had? $50,000 in sav ...

Consider a borrower that is approved for a standard 10-year

Consider a borrower that is approved for a standard 10-year, fully amortizing house mortgage with an original balance of $500,000 and a note rate(annual interest rate) of 4.8% (Standard refers to a fixed rate mortgage co ...

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