Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Confidence interval for true mean and determination of sample size.

A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages plus Yellow Pages. On each page, the mean area devoted to display ads was measured (a display ad is a large block of multicolored illustrations, maps, and text). The data (insquare millimeters) are shown below:

0 260 356 403 536 0 268 369 428 536 268 396 469 536 162 338 403 536 130

(a) Construct a 95 percent confidence interval for the true mean.

(b) Why may normality be an issue here?

(c) What sample size would be necessary to get an error of ±10 square millimeters with 99 percent confidence?

(d) If this is not a reasonable requirement, suggest one that is.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M918196

Have any Question? 


Related Questions in Statistics and Probability

The points for each sub-question are shown in parentheses

The points for each sub-question are shown in parentheses. As other homework assignment, there are 35 points for this assignment. 1. You believe that persons who grew up in small towns are more likely to vote Republican ...

Several questions refer to the basic sample persons whose

Several questions refer to the Basic Sample: persons whose age is in the 21-27 (inclusive) range, who are working at least 40 hours per. Consider the Basic Sample only. Create standardizations (z-scores) of for the varia ...

Supposenbspnbspare a sequence of independent and

Suppose   are a sequence of independent and exponentially distributed random variables with Assuming that is an odd number    for some integer K ): (a) Find the PDF of the median of the sequence. (b) Find the expected va ...

According to figures released by the new york city

According to figures released by the New York City government, smoking among New York City teenagers is on a decline, continuing a trend that began more than a decade ago (The New York Times, January 2, 2008). According ...

Suppose a process can be considered to be in one of two

Suppose a process can be considered to be in one of two states (let's call them state A and state B), but the next state of the process depends not only on the current state but also on the previous state as well. We can ...

Prove that the sequence of sample means of iid random

Prove that the sequence of sample means of IID random variables converges in the MS sense. What conditions are required on the IID random variables for this convergence to occur?

What sources can you find on the presence on the vikings in

What sources can you find on the presence on the Vikings in North America? What do we know about those Vikings who may have crossed the Atlantic five hundred or more years before Columbus? Look especially for very recent ...

A market researcher wants to study the television viewing

A market researcher wants to study the television viewing habits of a particular small city. A sample of 40 adult residents is asked to record their television viewing in one week. The results are: Viewing time: = 15.3 h ...

In the game of blackjack aces are worth 11 points or they

In the game of blackjack, Aces are worth 11 points (or they can also be counted as 1 point, but for the sake of this problem, we will only count them as 11 points), 10s, Jacks, Queens, and Kings are all worth 10 points a ...

A certain three-state markov chain has a transition

A certain three-state Markov chain has a transition probability matrix given by Determine if the Markov chain has a unique steady-state distribution or not. If it does, find that distribution.

  • 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