# Question: Suppose you need to sample the concentration of a chemical

Suppose you need to sample the concentration of a chemical in a production process that goes on continuously 24 hours per day, 7 days per week. You need to generate a random sample of six observations of the process over a period of one week. Use a computer, a calculator, or a random number table to generate the six observation times (to the nearest minute).

## Answer to relevant Questions

If the population mean is 1,247, the population variance is 10,000, and the sample size is 100, what is the probability that x̄ will be less than 1,230? An economist wishes to estimate the average family income in a certain population. The population standard deviation is known to be $4,500, and the economist uses a random sample of size n = 225. What is the probability that ...A quality-control analyst wants to estimate the proportion of imperfect jeans in a large warehouse. The analyst plans to select a random sample of 500 pairs of jeans and note the proportion of imperfect pairs. If the actual ...Suppose you are sampling from a population with population variance σ2 = 1,000,000. You want the standard deviation of the sample mean to be at most 25. What is the minimum sample size you should use? In problem 5-44, what is the probability that the sample proportion will be at least 0.45? In problem 5-44 When sampling is for a population proportion from a population with actual proportion p = 0.5, using a sample of ...Post your question