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What is the probability of an accident during a trip? If there was an accident, what is the probability that the passenger was traveling by car (C)?
The average score for male golfers is 95 and the average score for female golfers is 106 (Golf Digest, April 2006). Use these values as the population means for men and women and assume that the pop
1) The population proportion is .30. What is the probability that a sample proportion will be within ±.04 of the population proportion for each of the following sample sizes?
Suppose that X1...Xn form a random sample from a normal distribution with mean=u (u pronounced mu) and variance=1.
The total blood cholesterol concentrations, in mg/dL, are shown below for a random sample of six people. In the table below, x is the age of the subject and y is the subject's total cholesterol conc
Show the sampling distribution of p?, where p? is the sample proportion of adults using the Internet. What is the probability that the sample proportion of adults using the Internet will be within &p
The question is: A smaple of 50 la crosse school district teachers found that 72% had a summer job. Find each of of the following:
Consider the series-parallel networks depicted below. Each system comprises four components. The time-to-failure for components (1) and (2) is exponentially distributed with a mean of one year; the
How should you calculate confidence interval using quantiles from a t-distribution and with how much degree of freedom? Is it approprait to use in calculating the confidence of interval quantiles
Find the probability that between 6 and 11, EXCLUSIVE, people said their local radio stations always play the kind of music they like.
What is the lottery's expected profit per ticket? What is the lottery's standard deviation of profit per ticket?
The claim is the proportion of peas with yellow pods is equal to 0.25 (or 25%). The sample statistics from one experiment include570 peas with 132 of them having yellow pods. Find the value of the t
Suppose the covariance between Y and X is 0.03 and that the variance of Y is 0.04 and the variance of X is 0.12. The sample size is 30. Using a 5% level of significance, which of the following is mo
The random variable X has a binomial distribution with parameters n=100 and p=0.10.What distribution model would be appropriate to use to calculate an approximate value for the probability P(X=10).
The random variable X has a Poisson distribution with mean 40. Give an approximate value of the probability P( 37 less than or equal to X less than 41 ) using the central limit theorem with a cont
In this problem, we explore the effect on the standard deviation of adding the same constant to each data value in a data set. Consider the following data set.
Determine the point estimate of the population mean and margin of error for the confidence interval. lower bound is 16, upper bound is 26.
Signatures to a petition were collected on 676 sheets. Each sheet has enough space for 42 signatures, but on many sheets a smaller number of signatures was collected. The number of signatures per sh
Give an unbiased estimator of the following and give the estimated variance assuming ni=n:
Rolling dice 25 times gives the below results. Using your results, find the relative frequency for each of the values: 2, 3, 4, 5, _ , 12.
What is the probability that a randomly selected family owns both a dog and a cat? What is the conditional probability that a randomly selected family doesn't own a dog given that it owns a cat?
A security camera is used to monitor a particular survillence area to report wheather there is any threat present or not . the probability that the camera correctly detects an actual threat as "thre
a) Show the sampling distribution of x? for male golfers. b) What is the probability that the sample mean is within three strokes of the population mean for the sample of male golfers?
The population proportion is .30. What is the probability that a sample proportion will be within ±.04 of the population proportion for each of the following sample sizes?
Use the reported numbers as the population proportions and assume that samples of 300 adults and 300 youths will be used to learn about attitudes toward Internet security.