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A politician claims that she will receive 59% of the vote in an upcoming election. The results of a properly designed random sample of 100 voters showed that 53 of those sampled will vote for her.
(a) Find the 95% confidence interval for the true mean decrease in the drying time based on this sample. (Give your answers correct to two decimal places.) to (b) Do you think these percentages aver
Use the data to construct a 95% confidence interval estimate of mean the mean duration of game play. 4044 3877 3866 4035 4324 4807 4662 4043 5002 4824 4334 4325.
Construct a 95% confidence interval estimate for the mean μ using the given sample information. (Give your answers correct to two decimal places.) n = 29, x = 16.5, and s = 2.3
The NFL is strict about the size and weight of footballs produced to be used in games. Wilson, the company that produces the footballs states that all footballs manufactured follow a normal distrib
Given that the selected individual has at least one card, what is the probability that he or she has a Visa Card?
Ninety percent of all vehicles examined at a certain emissions inspection station pass the inspection. Assuming that successive vehicles pass or fail independently of one another, calculate the fol
Suppose a lot is received and it has 3% defective, i.e. there are only 3 defectives in the lot of 100 units. What is the probability that it will be accepted? Please write the mathematical equation
What is the probability that out of seven days in a week, the computer system will be fully operating for at least five days? What is the probability that the computer system will not be fully operati
From 18 potential women jurors and 28 potential men jurors, a jury of 12 is chosen at random. Let X be the number of women selected. Fond the probability mass function of X
A private opinion poll is conducted for a politician to determine what proportion of the population favors decriminalizing marjuana possession. How large a sample is needed in order to be 98% confid
The grade point averages for 10 randomlly selected high school students are listed below. Assume the grade point averages are normally distributed. Find a 98% confidence interval for the true mean.
A researcher is studying a group of 20 senior citizens in two groups of 10, from 55 to 74 to see if they become depressed over time as they age and health declines, Can some one do a test for me tha
A random sample of 50 patients is given the new drug and 35 of them obtain relief. The P-value for the test of H0: the new drug is the same as the standard versus H1: the new drug is better than the
A case-control study yields a 2x2 table with 2n observations in the upper-left cell, and n observations in each of the other three cells. Find the minimum value of n so that a 95% CI for the OR is e
Describe and explain any similarities or differences between the significance of z-scores in your R output and the significance of the deviance value.
It is decided to model aggregate claims S with a compound distribution of the form S = X 1 + ··· + X N where E ( N ) = 100 but N may be either Poisson, binomial or negative bino
What is the best point estimate of the population mean net changes in LDL cholesterol after the garlic treatment? Construct a 95% confidence interval estimate of the mean net change in LDL cholester
A fair 6-sided die is rolled, the number showing is a random variable X with E(X) = 3.5 and SD(X) = sqrt(35/12). The expected value, and standard deviation, sigma, of the sum of three 12 independent
What is the value of the test statisic? Formula used. What is the P value? formula used. What is the critical value? How did you deteremine this? What is the area of the critical region?
Describe and explain any similarities or differences between the significance of z-scores in your R output and the significance of the deviance values.
Let X be the number of people in a household for a certain community. Consider the following probability density for X, which assumes that there are no more than severn people in the household:
Production line workers assemble 15 automobiles per hour. During a given hour, four are produced with improperly fitted doors. Three automobiles are selected at random and inspected. Let X denote th
What is the minimum number of integrated circuit boards that must be manufactured in order to be at least 98% sure that there are at least 24 that have no defects?
What does the error term represnt conceptually? What does a model equation look like with an error term included (both linear and quadratic)? Do we want error term to be large or small? Why?