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If the number of people that voted for the candidate in the sample is 0, do you think that this could be used as a proof to contradict the candidate's pronostic? Back your claims with quatitative in
The joint distribution of a proportion of votes for candidate X and a proportion of votes for candidate Y is given by fx,y(x,y)=1, 0<=x<2, 0<=y<=1, 2y<=x.
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10000. Pilot studies suggest that the population standard deviatio
Give a 95% confidence interval for the difference in the proportions. Calculate for [larger] - [smaller]. What is the lower confidence limit for the 95% CI?
Give a 95% confidence interval for the difference in the two proportions. (Be sure to let population 1 correspond to the group with the higher proportion so that the difference will be positive.)
Specify the approximate sampling distribution of the sample proportion of women who worked last summer, p-hat(w). What is the mean?
Twenty-five job applicants are randomly selected from one large university and they produce a mean score and standard deviation of 183 and 12, respectively. Use a 0.05 level of significance to test
Assume that the shower times are normally distributed with a standard deviation of 2.2 minutes. Find the percentage of guest who shower no more the 8 minutes.
Examine the given statements then express the null hypothesis and alternative hypothesis in symbolic form. Be sure to use the correct symbol (? , p, ?) for the indicated parameter.
An automobile manufacturer would like to know what proportion of its customers are dissatisfied with the service received from their local dealer. The customer relations department will survey a ran
What is the lower limit of the confidence interval? What is the upper limit of the confidence interval?
Let Y be b(192,p). We rehect H0:p=0.75 and accept H1: p>0.75 if and only if Y>=152. Use the normal approx to determine.
Develop a 95% confidence interval estimate of the mean annual salary for all sales persons, regardeless of years of expirience and type of position.
The average/mean of time waiting for a heart transplant is 132 days, and. the standard deviation is 19.8 days. What is the least amount of days spent waiting for a heart that would still place a pat
A person's level of blood glucose and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood.
Batteries' life spans are normally distributed. The mean is 2300. The standard deviation is 20 hours. What percent of batteries have a life span of more than 2330 hours?
Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you
Use the normal distribution of SAT critical reading scores for which the mean is 500 and the standard deviation is 108 Assume the variable x is normally distributed.
What are your thoughts and Research regarding issues facing US? What decision making process needs to be implemented? I know there is no overnight solution, but it needs to start at somewhere. Do y
1. In a hospital's shipment of 3,500 insulin syringes, 14 were unusable due to defects. Is this sufficient evidence to reject future shipments from this supplier if the hospital's quality standard r
A random sample of medical files is used to estimate the proportion p of all people who have blood type b.
In a sample of 61 randomly seldom selected students, 31 flavored the amount being budgeted for next years intramural and interscholastic sports. Construct a 98% confidence interval for the proportio
A technician monitoring a group of five computers in an automated manufacturing facility. it takes an average of 15 minutes, exponentially distributed, to adjust any computer that develops a problem
The estimate of the population proportions is to be within plus or minus .10, with a 95 percent level of confidence. The best estimate of the population proportion is .15. How large a sample is requ