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# Find the standard deviation of random variable x

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rd deviation of 3.2 hours. A sample of 35 high school seniors is selected. Find the following values, if possible. Please round your answers to four decimal places. If you should not find a probability, please write NA for your answer. What is the probability that the sample mean studying time is between 4 and 5 hours? What is the probability that the sample mean studying time is less than 6 hours? What is the probability that the sample mean studying time is more than 8.5 hours?
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xt 4 tests are performed, find P(x=0), P(x=1), P(x=2),P(x=3) and P(x=4). SHOW ALL WORK TO GET CREDIT) 4) Use the confidence interval (99%) to solve the following question. A company is trying to establish the number of average amount of funds that are owed by its employees. They collect 1,000 accounts and found the sample average owed is \$250 with a standard deviation of 10. Calculate the confidence interval (MUST SHOW ALL WORK TO GET CREDIT) 5) Use the t distribution formula and table to solve the following question. A random sample of 91 with a sample average of 90 and a standard deviation of 4.2 hours, calculate the confidence interval at 98% (MUST SHOW ALL WORK TO GET CREDIT) 6) A poll of 3,000 adults out of 5,500 was collected to found that they did not get a master’s degree. Calculate the confidence interval at 95%. (MUST SHOW ALL WORK TO GET CREDIT)
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ion for the data. Thanks
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illion dollars. If the mean revenue was 50 million dollars and the data has a standard deviation of 15 million, find the percentage. Assume that the distribution is normal. Round your answer to the nearest hundredth.
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ard deviation of 18 million. Find the percentage of companies with revenue greater than 95 million dollars. Assume that the distribution is normal. Round your answer to the nearest hundredth.
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n of μ= 160.4 and a standard deviation of σ = 9.0760. If all possible samples of size 13 are drawn from this population, find the percentage of them that would have means between 154 centimeters and 156 centimeters?
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n of μ= 160.4 and a standard deviation of σ=9.0760. If all possible samples of size 13 are drawn from this population, find the percentage of them that would have means between 154 centimeters and 156 centimeters?
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e customer is 4 per year with the standard deviation 2. Find the probability that the total number of yearly claims in the service department does not exceed 50000.
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

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