A survey is planned to determine the mean annual family, Ask an Expert

Statistics

A survey is planned to determine the mean annual family medical expenses of employees of a large company. The management of the company wishes to be 95% confident that the sample mean is correct to within plus-or-minus $50 of the population mean. A previous study indicates that the standard deviation is approximately $400.

a) How large a sample size is needed?

b) If management wants to be correct to within plus-or-minus $25, what sample size is necessary?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9358509

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Suppose a sample space has things ab and c twice draw from

Suppose a sample space has things a,b and c. Twice, draw from the sample space and replace. The possible sequences formed are {aa, ab, ac,ba,bb, bc,ca,cb,cc} Now suppose there are Y different things. There are Y ways the ...

The stat 200 course coordinator wants to estimate the

The STAT 200 course coordinator wants to estimate the proportion of all online STAT 200 students who attend Penn State Learning tutoring sessions. In a survey of 72 students during the Summer 2018 semester, 8 had attende ...

Let timco use a capital structure that is 35 debt and 65

Let Timco use a capital structure that is 35% debt and 65% equity, The firm can borrow at 6%. The tax rate is 40%. Let the firm beta be 1.9, the market return 14%, and the risk free rate 2%. Find the WACC.

On valentines day thenbspquiet nooknbsprestaurant offers

On Valentine's Day the Quiet Nook restaurant offers a Lucky Lovers Special that could save couples money on their romantic dinners. When the waiter brings the check he also brings a scratch-off ticket that the couple ...

What p-value was found when determining whether there is a

What P-value was found when determining whether there is a difference in the IQ of girls and boys in problem 6? Should you reject the null hypothesis? 1. P-Value = 0.465. Yes, you should reject the null hypothesis which ...

100 people are invited to the party each guest is estimated

100 people are invited to the party. Each guest is estimated to eat 0 or 1 or 2 sandwiches with probabilities 0.2,0.50.3 respectively. How many sandwiches should be ordered ro be approx 90% confident that there will be e ...

Tossing a fair coin three times whats the probability that

Tossing a fair coin three times, what's the probability that at least one head will occur?

Before-tax cost of debt and after-tax cost of debt david

Before-tax cost of debt and after-tax cost of debt David Abbot is buying a new house, and he is taking out a 30-year mortgage. David will borrow $200,000 from a bank, and to repay the loan he will make 360 monthly paymen ...

Your environmental science professor designs an experiment

Your environmental science professor designs an experiment to see whether students in her class care about recycling. She places a recycling bin and a trash bin at the front of the class and then hands out a piece of pap ...

The table to the right shows the results of a survey in

The table to the right shows the results of a survey in which 2575 adults from Country? A, 1126 adults from Country? B, and 1072 adults from Country C were asked if human activity contributes to global warming. Complete ...

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