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The lifetimes of brakes manufactured by company A are random with density function g(x)=\begin{cases} \frac{1}{8}e^{-x/8} & x>0\\ 0 & x\le 0. \end{cases} The lifetimes of brakes manufactured by company B are random with density function h(y)=\begin{cases} \frac{1}{11}e^{-y/11} & y>0\\ 0 & y\le 0. \end{cases} A man installs brakes on his two cars simultaneously, one from company A and the other from company B. What is the probability that brakes from company B last longer than those from company A?
Find the complex solution to this quadratic equation: x^2 + 6x + 10 = 0.
Assume that the president is correct and p = 0.26. What is the sampling distribution of for this study? What is the probability that the sample proportion will be between .20 and .40 (to 4 decimals)?
The five year surival rate for Caucasians for all forms increased from 37% in 1960 to 58% now. Express this change in two ways (1) as an absolute difference in terms of percentage points and (2) as a relative difference in terms of percent.
Using the empirical rule what percentage of adults is 25 - 45 has iq score bet 70 and 130.
The total cholesterol level of US females 2 years old or older is normally distributed with a mean of 206 mg/dl and a standard deviation of 44.7
a statistician employed by a consumer testing organization reports that at 95 confidence he has determined that the
Assembly line from which to observe the work habits of the workers on the line. what is the probability that the point she selects within 25 feet of the end of the line?
Create a 98 percent confidence interval for the population mean.
Highway Gas Station Convenience Store
Probability using discrete distribution.The probability distribution for the random variable x follows.
1.a national poll of 600 men announced that the proportion in the survey who claimed to help their wives at home was
Compute the correlation and sample covariance. Compute the sample covariance and the sample correlation. Intuitively, what kind of correlation.
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