Answer Happy

Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). This condition is associated with an average total calcium level below 6 mg/dl. Recently, the patient's total calcium tests gave the following readings (in mg/dl). Assume that the population of x values has an approximately normal distribution 9.30 9.60 10.30 0.90 9.40 9.80 10.00 9.50 11.20 12.10. LAUSE SALT (a) Use a calculator with mean and sample standard deviation keys to find the sample mean reading and the sample standard deviation s. (Round your answers to four decimal places.) mg/ mg/d (b) Find a 99.9% confidence interval for the population mean of total calcium in this patient's blood. (Round your answer to two decimal places) lower limit upper limit mg/dl mg/dl
Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky Mountain Chocolate Factory. Startup costs (in thousands of dollars) for a random sample of candy stores are given below. Assume that the population of x values has an approximately normal distribution. 94 178 133 99 75 94 116 100 85 LA USE SALT (a) Use a calculator with mean and sample standard deviation keys to find the sample mean startup cost and sample standard deviation s. (Round your answers to four decimal places.) XH thousand dollars EW thousand dollars (b) Find a 90% confidence interval for the population average startup costs for candy store franchises (Round your answers to one decimal place.) lower limit thousand dollars upper limit thousand dollars
How much do wild mountain lions weigh? Adult wild mountain lions (18 months or older) captured and released for the first time in the San Andres Mountains gave the following weights (pounds): 71 102 131 128 60 64 LA USE SALT Assume that the population of x values has an approximately normal distribution... (a) Use a calculator with mean and sample standard deviation keys to find the sample mean weight x and sample standard deviation s. (Round your answers to four decimal places.) (0) Find a 75% confidence interval for the population average weight of all adult mountain lions in the specified region. (Round your answers to one decimal place.) lower limit upper limit
What percentage of hospitals provide at least some charity care? Based on a random sample of hospital reports from eastern states, the following information is obtained (units in percentage of hospitals providing at least some charity care): 56.9 56.5 52.5 65.7 59.0 64.7 70.1 647 53.5 78.21 Assume that the population of x values has an approximately normal distribution. (a) Use a calculator with mean and sample standard deviation keys to find the sample mean percentage x and the sample standard deviations (Round your answers to four decimal places.) X LAUSE SALT Sw (b) Find a 90% confidence interval for the population average of the percentage of hospitals providing at least some charity care. (Round your answers to one decimal place.) lower limit upper limit