Always remember to interpret your solutions.
The manager of a large factory wants to know the average hourly wage of its employees. From a sample of 200 employees the sample mean wage was $9.97 per hour with a standard deviation of $1.42.Calculate a 90% confidence interval for the mean.
We are 90% confident the average hourly wage for all factory employees is between $9.81 and $10.14.
If one wanted an interval that contains at least 90% of the hourly wages for the company how would the calculations be different?This range must contain 90% employees" hourly wages, rather than the mean hourly wage. This can be answered by using the empirical rule, if the wages are normally distributed, or Chebyshev's rule, if they are not. Both rules find a range of values by adding and subtracting a number of standard deviations to and from the mean rather than a number of standard errors.The president of a company, who owns and operates movie theatres in Wyoming, is concerned about his business. Due to the simplicity of going out and renting a movie to watch at home, the number of people going to see movies in the theatre is steadily declining. He directs his staff to conduct a study in order to estimate the mean number of movies people in Wyoming rented during December. After conducting a phone survey, the staff found that the mean number for 300 randomly selected people was 2.4 with a standard deviation of 1.6. What is the true mean with 95% confidence? .
We are 95% confident the mean number of movies rented by people in Wyoming during the month of December is between 2.22 and 2.58.The president then wants to know the proportion of people who rent at least 2.5 movies per month. Assume that the distribution of the number of movies rented is normal with a mean and standard deviation approximately the same as what was obtained in the sample.
Approximately 47.61% of people in Wyoming rent more than 2.5 movies per month.
Stats Statistics is a mathematical tool used for making sense out of numerical data. It is used mainly as a tool for better decision making. It involves variables and numbers, which if correctly calculated, the outcome usually tells us the answer to our hypothesis. Statistics is indubitably imp...
Here are some of the web sites that we found that we feel would help us lead a debate regarding this topic: http://nces.ed.gov/pubs2001/2001071.pdf Governmental Stats on Public Internet Access in Schools *The data is from 1994-2000 and it was written in 2001 This web page talks about how public schools use a filtering system along with use of teacher/staff monitoring. http://alexia.lis.uiuc.edu/gslis/research/internet.pdf Survey with info and stats regarding Internet in libraries, including stats on filtering and adult usage http://www2.epic.org/cda/cda_decision.html Brief on Supreme C...
They try to prove their point of view by comparing stats and figures, but I feel that this is unfair. Even though Mario has excellent stats, I feel to be able to truly see who is better you must look at all aspects of the game and skills of the players who play it. ... It is these stats and stick handling skills that enabled Mario to score the most goals in the NHL in one season three times in his career. ... These stats are incredible considering the increasing skill level, aggression and intensity of the game. These stats are just scratching the surface of Mario's extraordinary ca...
C2: Globalism avoids the harms of statism Sub A: Statism produces war When a statist, sovereign attitude is accepted and united globalistic effort is tossed out harms soon follow because the nationalistic attitude creates conflicts of interest and ultimately wars. Any Rand explains this concept, "Statism -in fact and in principle-is nothing more than gang rule. ... Statism needs war; a free country does not. Statism survives by looting; a free country survives by production. ...
Narcissistic Personality Disorder The so-called "narcissistic personality disorder" is a complex and often misunderstood disorder. The cardinal feature of the narcissistic personality is the grandiose sense of self-importance, but paradoxically underneath this grandiosity the narcissist suffers from a chronically fragile low self-esteem. The grandiosity of the narcissist, however, is often so pervasive that we tend to dehumanize him or her. The narcissist conjures in us images of the mythological character Narcissus who could only love himself, rebuffing anyone who attempted to touch him. Ne...
I spent several minutes looking up at the "intimidator" board with all of Barbe's program stats that included things such as: players taken in the MLB draft, 30 win seasons (my school has never had a 30 win season and this school has a stat on how many 30 win seasons they have had), highest winning percentage in a season, and most home runs in a season, all of which I was amazed to see. Next to the stats board was a huge sign that read "Home of the 2014 National Champion Barbe Buccaneers". ...
Especially a drug that can make your stats some what tainted. ... Barry bonds shouldn't be denied access to the hall of fame when his stats are hall of fame numbers but the league weren't as strict as they are now with the drug policy. ... To be honest he should be in the hall of fame due to his stats and great performance and as well as his countless awards that he won in his long career as a baseball player. Even before the steroids he was a future Hall of Fame and numbers and stats don't lie....
(Legatum Prosperity Index, 2013-2014) The situation today is much more complex however, so all of these stats are expected to go down, implying the situation being less economically stable and the country being less prosperous. ... The stat that says Nepal is ranked 58th of 158 countries in the Happy Planet Index indicates a similarity to concept of happiness mentioned earlier as well....
His career stats are nothing to ignore with 1647 runs scored, 3184 hits, 431 homeruns, 1695 runs batted in, and a batting average of .285. These stats don't come from an average baseball player in the Majors. To have these stats and awards you must be a fabulous athlete with much talent and skill. ...
(Stats on pg.206) - At every stage of their lives, women are more prone to poverty than men, and more likely to be trapped, and eventually die, in a life of poverty The household as an economic unit Private Realm - Social and Biological reproduction (mostly women dominated) Public Realm - Productive Labour, earning an income (dominated by men) Women Men *Double Ghetto - Unpaid Domestic Labour *Highly paid, high-status - Poorly Paid (low-status pi...