Probability density function of the length
Suppose the probability density function of the length of computer cables is f(x) = 0.1 from 1200 to 1210 millimeters. Determine the standard deviation of the cable length.
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A binomial probability is given. Write the probability in words. Then use a continuity correction to convert the binomial probability to a normal distribution probability.
The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30 and the sample statistics include n=1463 subjects with 410 saying that they smoked a cigarette in the past week.
The Director of Transportation for Big State University has asked for your help in evaluating the usage of one of the university's larger parking facilities. A student government organization has made the claim that, on average, more than 1,500 ca
A study was conducted to investigate the relationship between maternal smoking during pregnancy and the presence of congenital malformations in the child. Among children who suffer from an abnormality other than Down's syndrome or an oral cleft, 3
Electrical engineers recognize that high neutral current in computer power system is a potential problem. A recent survey of computer power system load currents a U.S.sites found that 10% of the sites had high neutral to full-load current ratios.
GPA of freshmen students follows a normal distribution with mean 2.1 and standard deviation 0.6. How many freshmen will score between 2.5 and 3.5 if the class has 300 students?
A 99% confidence interval for the mean of a normal population when the standard deviation ? is known is found to be 98.6 to 118.4. If the confidence level is reduced to .95, the confidence interval for ?
The theorem that states that the sampling distribution of the sample mean is approximetly normal when the sample size n is reasonably large is known as the
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