Defectives in the sample
Suppose a very large collection of ball bearings has 0.10 percent defective. If we take a sample of 2500 bearings, what is the probability that we get at least two defectives in the sample? Solve the problem using binomial method.
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Examine the following sample data and determine whether it comes from an approximately normal distribution. In other words, create a stem-and-leaf plot, analyze how much of the data lies with 1,2 and 3 standard deviations of the mean, and find IQR
Ina survey of 3464 adults, 1468 say they have started paying bills online in the last year. Construct a 99% confidence interval for the population proportion.
Find the minimum sample size needed, using a prior study that found that 54% of the respondents said they have high speed internet access.
Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) Calculate the standard deviation of the six x-values and the standard deviation of the six y-values. (Give your answers correct to three decimal
When performing a hypothesis test and the population standard deviation is known, what is the p-value for a test-statistic of -1.63? Round your answer to 4 decimal places.
1. When performing a hypothesis test and the population standard deviation is known, what is the p-value for a test-statistic of -1.63? Round your answer to 4 decimal places.
Adult females have an overhead reach distance: mean of 200.5 cm with standard deviation of 8.6 cm. Assume the reach distances are normally distributed. If 1 adult female is randomly selected, find the probability that her overhead reach is less tha
Men's heights are normally distributed with a mean of 69.5 in. and standard deviation of 2.4 in. Women's heights are normally distributed with a mean of 63.8 in. and standard deviation of 2.6 in. 1. The U.S Air Force requires that pilots have heig
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