Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

describe 95% confidence interval for the population mean.

1. Private colleges as well as universities rely on money contributed by individuals and corporations for their operating expenses. Much of this funds is put into a fund called an endowment and the college spends only the interest earned by the fund. A recent survey of 8 private colleges in the United States revealed the following endowments (in millions of dollars) - 60.2, 47.0, 235.1, 490.0, 122.6, 177.5, 95.4, and 220.0. Summary statistics yield = 180.975 and s = 143.042. Compute a 95% confidence interval for the mean endowment of all the private colleges in the United States assuming a normal distribution for the endowments.

a)  $180.975± $94.066

b)  $180.975± $99.123

c)  $180.975± $116.621

d)  $180.975± $119.586

2. An economist is interested in reading the incomes of consumers in a particular region. The population standard deviation is known to be $1000. An arbitrary sample of 50 individuals resulted in an average income of $15,000. describe what is the width of the 90% confidence interval?

a) $232.60

b) $364.30

c) $465.23

d) $728.60

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923370

Have any Question? 


Related Questions in Statistics and Probability

Write a matlab program to calculate the Write a MATLAB program to calculate the

Write a MATLAB program to calculate the probability     Write a MATLAB program to calculate the probability if is a Gaussian random variable for an arbitrary a  and b > 0 Note you will have to specify the mean and varian ...

Cards are drawn from a standard 52-card deck after each

Cards are drawn from a standard 52-card deck. After each card is drawn, it is put back in the deck and the cards are reshuffled so that each card drawn is independent of all others. Let be the random variable that repres ...

Thirty percent of a corporations blue-collar employees were

Thirty percent of a corporation's blue-collar employees were in favor of a modified health care plan, and 23% of its blue-collar employees favored a proposal to change the work schedule. Thirty- percent of those favoring ...

Consider a non-linear device such that the output

Consider a non-linear device such that the output is   where the input  consists of a signal plus a noise component,    Determine the mean and autocorrelation function for  when the signal    and the noise   are both Gau ...

The inputnbspnbspto a filter is a discrete-time zero-mean

The input   to a filter is a discrete-time zero-mean random process whose autocorrelation function is   The input/output relationship of the filter is given by (a) Find the autocorrelation function of the output  (b) Fin ...

Curve fittingthe following data points were found

Curve fitting The following data points were found experimentally, x 1 2 3 4 5 6 7 7.5 8 9 10 y 1 4 8 12 16 20 22 25 28 33 45 personalise this data by adding one intermediate point, with a value of y that fits into the g ...

A company finds that 1 out of every 6 workers it hires

A company finds that 1 out of every 6 workers it hires turns out to be unsatisfactory. Assume that the satisfactory performance of any hired worker is independent of that of any other hired workers. If the company hires ...

In order to save costs a firm issued a guideline that fax

In order to save costs, a firm issued a guideline that fax transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed but they want the average to be 10 or below. The firm examined 35 ...

Two fair dice are rolled let one of the dice be red and the

Two fair dice are rolled. Let one of the dice be red and the other green so that we can tell them apart. Let be the sum of the two values shown on the dice and be the difference (red minus green) of the two values shown ...

Suppose you have a population with two men- one democrat

Suppose you have a population with two men- one democrat; and one a republican; and two women- one a democrat and one a republican. For a simple random sample of size 2, all samples of size 2 have the same chance of bein ...

  • 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

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate